Penises come in all shapes and sizes. But the average length of an erect, adult penis is between 5 and 7 inches. Because teen boys' bodies are growing through puberty, there is no accurate average size for younger guys.

Most guys reach their full adult penis size by the time they get into their early 20s. A penis that is small when soft (flaccid) gets much bigger when erect, but a penis that's longer when soft won't grow as much when it's hard.

A lot of guys get hung up on the size of their penis. But the truth is size really doesn't matter that much when it comes to being able to give or receive pleasure during sex.

Just like some people are attracted to large or small breasts, others are attracted to large or small penises. Pleasing a partner is not about the size and shape of body parts, but rather the way they're used and learning what pleases your partner.