As many as 1 in 3 men say they've experienced premature ejaculation at some point, which is when men ejaculate within one minute of penetration. While most women can agree we'd want our partners to last longer than one minute, how long should the typical guy aim to last?

"Five and a half to six minutes," according to studies on how long it took men to reach orgasm following penetration, said Dr. Mike Anderson, a sex and relationship expert. "Both porn and popular media give the impression that, when it comes to time spent on sex, longer is better. Perhaps we've just been culturally conditioned to think that sex should last longer than it really does."

Average time spent during sex

The popular idea of going "all night long" could be setting unrealistic expectations. A 2004 study by the Journal of Sex Research surveyed 152 heterosexual couples about how long they spend on