Sex

Sperm come in tons of sizes, and it all has to do with how they have to find the egg.

Pornography was listed as the top source of information about sex for 18- to 24-year-olds, a troubling ranking given that pornography is not meant as sex education.

New high-speed video reveals human sperm don't swim like we thought.

There are a number of ideas about why the female orgasm happens.

Removing pubic hair may not increase your risk of sexually transmitted diseases, according to a small new study.

Experts in New Zealand are warning men not to consume a type of lichen that's been touted as a natural treatment for erectile dysfunction.

Ever since Gwyneth Paltrow endorsed vaginal steaming, doctors have warned that the practice isn't without risks.

A medical procedure that has been used to freeze a woman's ovaries is being offered for the first time as a way to delay menopause.

A woman in Spain developed a serious allergic reaction after a sexual encounter.

Women who trekked across Antarctica in the first-ever all-female expedition broke more than gender norms — they also busted this gender myth.