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Why Do Men Buy Sex?

Some researchers say johns seek intimacy on demand. Others believe that these men typically want to use and dominate women

By Nikolas Westerhoff

The Truth about Boys and Girls

The preference for playing hockey, or house, in the brain are small—unless grown-up house, is far from fixed. Sex differences up assumptions magnify them

By Lise Eliot

The Third Gender

Transsexuals are illuminating the biology and psychology of sex—and revealing just how diverse the human species really is By Jesse Bering

By Jesse Bering

The Humor Gap

Men and women may have different roles when it comes to comedy, but laughter is crucial from flirtation through long-term commitment

By Christie Nicholson

The Happy Couple

The key to keeping the magic alive in a marriage, experts say, is finding ways to promote the positive

The Father Factor

Could becoming a father after age 40 raise the risks that your children will have a mental illness?

By Paul Raeburn

Sex, Math and Scientific Achievement

Why do men dominate the fields of science, engineering and mathematics?

By Diane F. Halpern, Camilla P. Benbow, David C. Geary, Ruben C. Gur, Janet Shibley Hyde and Morton Ann Gernsbacher

Misery in Motherhood

A deep despair mars the first year of motherhood for as many as one in five women. Without treatment, postpartum depression can weaken critical bonds between a mother and her child

By Katja Gaschle

His Brain, her Brain

It turns out that male and female brains differ quite a bit in architecture and activity. Research into these variations could lead to sex-specific treatments for disorders such as depression and schizophrenia

By Larry Cahill

He Said, She Said

Women and men have different ways of speaking, but research reveals the conversational gender divide is not as stark as it seems

Affairs of the Lips

Researchers are revealing hidden complexities behind the simple act of kissing, which relays powerful messages to your brain, body and partner

By Chip Walter

A Patchwork Mind

We each have two parents, but their genetic contributions to what makes us us are uneven. New research shows we are an amalgam of influences from Mom and Dad

By Melinda Wenner Moyer

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