In over five million years of human evolution, only one organ has come to exist for the sole purpose of providing pleasure—the clitoris! The internal clitoris is part of an education most of us never had!
There is no requirement for it in reproduction.
It does not have a urethra running through it like the penis, and thus, there is no urination.
Its sole function—its singular, wonderful purpose — is to put a woman in a blissful state!