Men reach their sexual peak at 18, and women reach theirs at 28.
TRUE! With regard to their supply of sexual hormones, at least. Testosterone peaks at age 18 in men; women's estrogen hits its high point in their mid-20s. "But peak hormones don't mean peak sexual performance," says Marc Goldstein, M.D., a professor of reproductive medicine and urology at Cornell University's Weill Medical College. So feel free to try for a personal best--at any age.