Sex

Infidelity may be just one more risk for bold leaders.

Hooking up is often perceived as rampant on college campuses, but a new study suggests that's not the case.

Plants know how do it in all sorts of kinky ways.

Debate heats up over whether women in their fertile phase prefer more butch men.

For some organisms, short penises may not do the trick.

Assuming that men should dominate sexually might make you less confident and less safe during sex.

Perhaps this "no-disgust" ability doesn't work in women with sexual pain disorders.

Research in rats suggests an alternative to Viagra.

In the animal kingdom, loyal partners are rare.

Anxiety about sexual communication may kill the mood.

The substance may hint at human infertility causes.

U.S. swimmer Ryan Lochte has said that 70 to 75 percent of Olympians have sex during the Games. Olympic athletes are compelled to copulation by something even stronger than looks, experts say.

Journalists and scientists should avoid drawing human conclusions from animal studies, they say.

Genders battle it out over generations.

Pupils reveal the secrets of attraction.

Sexual objectification begins with how men and women are processed in the brain.

Wide variety found in one man's sperm.

What drives female sexuality after childbirth?