“Men’s nipples vary greatly in sensitivity, being completely erotic for some and totally unresponsive for others,” says Kenneth Play, international sex educator and sex hacker, and creator of the Sex Hacker Pro Series. In a 2006 study, 52% of men reported that nipple stimulation intensified their arousal. But did you know nipple play can feel really damn good, too? We’re talking touching, biting, and sucking them, and maybe even using nipple-centric sex toys.

You probably think of your penis (and maybe your prostate) as the star of the show when it comes to sex.