"All humans begin life in the womb as females. If there is a Y chromosome present in the embryo, the male sex hormone testosterone restricts
the full development of breasts to just nipples, the labia fuse to become the scrotum and clitoris develops fully to become a penis.
Some biology trivia because I am quietly freaking about my exam in half an hour
It is funny. :3 And I am proud to say that I knew this before.