This is a GUESS ok?
Easier to poop without it all sticking, and getting infections etc
I notice most animals have it too
Actually, I believe it is for flexibility. The seam allows each side of our gluteous maximus to work more independently of each other.
nzdaniel, I think it would be easier to void cleanly without the crack. Generally cling-ons stick to the sides so we would probably stay cleaner without the crack. Dogs and cats who lack a this generally do not need to wipe.What does it mean when you dream of a friends boyfriend?
well if there wasn't a crack, there would be really no place for the hole!!Funny/rude names :P
ummm all I can say is just ewwwWoman in the mens locker room
Looks better that way...