Penis

A reproductive organ in the male body that is used for urinating and during sex. Penises are generally small and shriveled looking, but when the male is aroused, the penis may expand and become harder. During sex, the penis is put inside another person's body and the male rocks his body back and forth. The male will then soon have an orgasm. During this orgasm, the male will feel a burning sensation in the penis as semen shoots out the tip. Search "Semen" for a definition on that part of reproduction.

We're not allowed to say penis in Stacy's house.
Hayley doesn't have a penis.
Lucas has a small penis.