A typical U.S. couple will have an age gap of 2.3 years -- but this wasn't always the case. Join Caroline and Cristen as they explore the average age gap, May-December relationships and the ultimate question: How large is too large of an age gap? Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

In this episode, Cristen and Caroline examine the relationship birth control and perceptions of promiscuity. Learn more about how birth control historically affected the outlook on premarital sex, and what happens when the cost of birth control rises. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

How did yoga become popular in the U.S.? In this episode, Cristen and Caroline take a closer look at the health benefits and physical risks of practicing yoga. Tune in to learn more. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

The United Kingdom has regulations against airbrushing in advertising, and the American Medical Association has an anti-airbrushing warning -- so how bad can airbrushing be? Join Cristen and Caroline as they explore the history of photo manipulation. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Cristen and Caroline talk to Melissa Petro, sex worker activist who retired from the New York City public school system after the media publicized her past work as a stripper and Craigslist sex worker. Petro talks to Stuff Mom Never Told You about how she's managed life since the scandal, the difference between consensual sex work and sex trafficking and why retiring from prostitution or escort work isn't as easy as people might think. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Studies have shown that the division of household labor is far from equal in most heterosexual domestic relationships -- but what about same-sex couples? Tune in as Cristen and Caroline explore the differences between labor division in these two groups. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Do women make better peacemakers? Join Cristen and Caroline as they examine the influence women have played in the peacemaking process and gender differences in conflict resolution. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Today's world is full of billionaires -- and they're not all men. Join Cristen and Caroline as they look at the state of women's global wealth, ultimately asking: Will a woman ever become the richest person in the world? Tune in to learn more. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Olympic women's wrestling started in 2004, and interest in the sport has grown since. Tune in as Caroline and Cristen look at the women of WWE wrestling, as well as the Cholitas, Bolivia's beloved women wrestlers, Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

The 2012 Summer Olympics mark the official debut of women's boxing, and fans have been waiting anxiously. In this episode, Caroline and Cristen explore the history of women's boxing, along with gender dynamics at the gym and inside the ring. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

How many people have actually faked an orgasm? How have cultural perceptions of orgasms changed over time? Join Cristen and Caroline as they cut past the cultural baggage and get to the facts behind sex and orgasms. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

The launch of a new Lego line specifically for girls brings up the question of gender neutral toys. Should there be different toys for boys and girls? Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

As of 2009, there were about 423,773 children in foster care in the U.S. While some children may return to their original families, some are adopted and others simply age out of the system. Learn more about foster care with Cristen and Caroline. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

As Valentine's Day approaches, Cristen and Caroline take a closer look at floriography and the meaning of flowers. Where do Valentine's bouquets come from? What's it like for women working in the flower industry? Tune in to learn more. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Do doctors listen to female patients? Women often complain of doctors not taking symptoms seriously, and patient-doctor mistrust is nothing new. Tune in to learn more about this relationship, including how stress influences a female patient's diagnosis. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

What is vulvodynia? How many women suffer from vulvodynia? How do vulvodynia treatments work? Tune in to learn more in this episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Are there gender differences in friendship patterns? Join Caroline and Cristen as they explore famous bromances throughout history, as well as challenges to making man friends. Tune in to learn more about bromances. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

In this episode, Cristen and Caroline explore the etymology of the term "frenemy," the psychology of female friendships and women's evolutionary tendencies toward cultivating friendships. Tune in to learn more. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Could a 1-cent soft drink tax really save millions of lives? What are the health impacts of drinking soda? Are diet soft drinks better for you? Join Cristen and Caroline as they look at the relationship between soft drinks and health. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Sure, men and women have different exercise motivations -- but which group exercises more? Join Caroline and Cristen as they look at gender and exercise, from why single men exercise more than anyone else to why men's exercise pays off more than women's. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

How did Martha Stewart get her start? How did she lose -- and recover -- her reputation and wealth? Is Martha Stewart good for women? Tune in for the answers to these questions and more. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

How much weight do women gain during pregnancy? What exactly is pregnorexia? Is it true that men can gain pregnancy weight, too? Join Caroline and Cristen as they take a closer look at pregnancy and weight gain. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

In this episode, Cristen and Caroline interview Mignon Fogarty, aka Grammar Girl. Listen in to learn if men and women pay attention to grammar differently, and if it's acceptable to refer to women as girls. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Are imaginary playthings friends or foes for child development? Psychologists have studied imaginary friends since the 1800s, and they've come to some fascinating conclusions. Tune in to learn more about imaginary friends. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Whether or not you're a fan of thongs, there's no denying that they attract attention. But where did these flimsy strings come from? Join Caroline and Cristen as they look into the origin of one of humanity's most controversial pieces of clothing. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Do people without siblings differ from the rest of the human race? Tune in as Caroline and Cristen look at the fiction -- and facts -- surrounding our stereotypes of only children. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

What exactly is the psychopath test? Are there really gender differences in psychopathy? In this episode, Caroline and Cristen explore the process of diagnosing psychopaths -- and whether your gender affects your chances of passing the psychopath test. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

What is the history of ear and body piercing? How does the underground sexual culture of piercing work? What does Alicia Silverstone have to do with the popularization of belly button piercing? Join Cristen and Caroline as they explore body piercing. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Do men complain more about being sick? Do women have stronger immune systems? Who takes the most sick days? Join Cristen and Caroline as they explore the facts -- and fiction -- surrounding popular opinions on gender and illness. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Who were flappers? Were flappers feminists? In this episode, Caroline and Cristen take a closer look at the iconic women known as flappers, touching on everything from Zelda Fitzgerald to flapper fashion. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

In the second part of this series, Cristen and Caroline explore the differences between comprehensive and abstinence-only sex ed. Does abstinence-only sex ed work? How is sex ed handled at home? Listen in for the answers to these questions and more. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Sex education is controversial in U.S. schools, but how did it begin? In this episode, Caroline and Cristen delve into the history of U.S. sex education, tracing the emergence of abstinence-only sex education and the federal cost of these programs. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

How have women's roles in spy film and TV changed over time? Join Cristen and Caroline as they take a look back at the history of the spy genre and famous fictional female spies. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Today Oprah Winfrey is one of the world's most famous people, but how did she get her start? In this episode, Cristen and Caroline look at Oprah's impact by the numbers, along with the controversy and criticism Oprah has encountered during her career. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

What's the difference between stress and anxiety? Why are women diagnosed with clinical anxiety twice as often as men? Join Caroline and Cristen as they take a look at how men and women's brains process stress and anxiety differently. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Several years ago, a study from Northwestern University argued that male bisexuality doesn't exist. Strangely enough, a new study from the same university contradicted the first. Is there a social stigma adding to the controversy? Tune in to learn more. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

What are pheromones, exactly? Do they affect levels of attraction in humans? Listen in as Caroline and Cristen explore the science behind pheromone myths, and why pheromones don't work for humans. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Almost everyone has a breakup song -- but why? In this episode, Cristen and Caroline explain how we process emotional rejection as physical pain and why music has an analgesic effect. Tune in to learn more (including which breakup songs may be the best). Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Despite folk wisdom, stress doesn't gray your hair. In this episode, Caroline and Cristen explain why you should blame gray hair on your parents, genes and health. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Where did drag originate? Where does it fit within the queer community? Join Cristen and Caroline as they explore the history of drag -- along with the stories of some notable drag queens -- in this episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Believe it or not, romance novels are the best-selling fiction genre. Join Cristen and Caroline as they explore the common romance novel heroes, heroines and themes, ultimately asking what romance novels tell us about female arousal. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

The human papillomavirus, or HPV, is the most commonly transmitted sexually-transmitted disease, and researchers have noted a rise in HPV-related cancers. Is the HPV vaccine safe and effective? Listen in to learn more about HPV. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Do slasher films glorify sex and violence toward women? What is the "final girl" archetype, and what can we learn from other slasher film tropes? Join Caroline and Cristen as they delve into the evolution of the slasher film genre. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Are women the new misogynists on fall TV? Has the portrayal of women on television improved? Join Cristen and Caroline as they explore the state of women in front of -- and behind -- the camera. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

The first Playboy Club opened in 1960. Waitresses called "bunnies" earned up to $1,000 per week, and the club aimed for a certain cachet. Yet when Gloria Steinem went undercover as a bunny she called it deplorable. So what happened? Tune in to find out. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Cristen and Caroline investigate the pros and cons of masturbation from a health and wellness perspective. Does it threaten relationships? What happens when masturbation provokes jealousy in relationships? Tune in to find out. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Masturbation can be a sensitive subject, and many people are uncomfortable asking questions about the practice. For example: Do men masturbate more than women? Is there an evolutionary explanation for masturbation? Tune in to learn more. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

More people are delaying or avoiding marriage, and also raising children outside of wedlock. Are single people penalized? Join Cristen and Caroline as they look at the statistics and explain why single women over 25 are the most stigmatized. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.