A new study finds that many ladies over 80 don't have a lot of sexual desire, but that doesn't really bother them — even if they're sexually active.

A new study shows vibrators can improve ladies' sexual function beyond just giving them more orgasms. And contrary to stereotype, most men are totally okay with that.

A new study on sex and marriage reveals that for preventing divorce, a husband's sexual satisfaction matters most. A wife's sexual satisfaction seems to have a more complex effect, and frequency of sex may not matter much at all.

A new study says "singles" over 45 are happier with their sex lives than married people of the same age. Intriguing — but accurate?

A new study found that sexually satisfied women had better "wellbeing" and "vitality" then less satisfied ones. But another study showed that women's spirituality was linked with having lots of unprotected sex.