Valentine's Day

Love Potion No. 9: Top 5 Love Chemicals in the Brain

Those crazy behaviors people exhibit when in love are often chalked up to fate, but science attributes them to a cocktail of chemicals buzzing around our brains. When love overwhelms our actions, which five neurochemicals are largely to blame?

The Look of Love: Top 5 Physical Signs of Attraction

Even if you can't describe your ideal romantic partner, you'll know him or her on sight. Your body will produce physical signs that grab your attention and direct it toward the crush in question. Which lovesick symptoms should you look out for?

The Science of Sex

Of all human activities, sex is possibly the ultimate mind-body experience. Which senses and body parts -- from head to toe -- does male and female sexual attraction engage?

Are open relationships healthier?

Recent research has found that open relationships may be healthier than monogamous ones. Cristen and Caroline investigate the dynamics, risks and rewards of open relationships.

237 Reasons Humans Have Sex

Asking why humans have sex might seem like an obvious question. It feels good. It bonds us together. Oh, and the future of the human species depends on it. But prior to the 2007 study, "Why Humans Have Sex," published in the Archives of Sexual Behavior, "the most comprehensive existing taxonomy" cited only eight reasons: "to feel valued by a partner, expressing value for a partner, obtaining relief from stress, nurturing one another, enhancing feelings of personal power, experiencing a partner's power, experiencing pleasure and procreating." Oddly, researchers hadn't delved too deeply into the seemingly simplistic question. With that 2007 study, then, University of Texas psychology professor David Buss handily myth-busted the notion that we can identify humans' rationales for sex on our fingers...

Public Displays of Affection Politics

How do public displays of affection compare to etiquette-friendly social kissing? How is PDA an act of love - and defiance -- in the LGBT community? And, do you love it or hate it? Listen in to learn how onlookers respond to PDA.

The Friendzone

What is the "friendzone" and where did the term come from? How does getting in - and out - of the friendzone work? Can friendships survive the friendzone? (Studies say maybe.) Tune in to learn more.

How Matchmakers Work

How do matchmakers help people find love? Who hires matchmakers and how much do they cost? Are matchmakers successful? The answers might surprise you. Join Caroline and Cristen as they explore the strange world of matchmaking.

The Hidden Costs of Valentine's Day Flowers

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.

Why do breakup songs hurt so good?

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).