Yes, it's immature.

But today I heard a colleague refer to it as a 'hairy axe wound'

It still makes me feel ill typing it out. Why would you refer to a vagina (deliberately PC) as that? It's filth!

Also, in a similar vein, somebody was once recounting the previous nights events when he'd gone home from a club with a girl. He (unnecessarily) told me that said girl had extremely long pubic hair. I said, "oh right, that sounds pretty disgusting", to which he replied "yeah, it was like eating sushi off a barber shop floor"

Unbelievable.

Anyway, as hideous as it is, does anybody have any comical genitalia slang? Yes, I'm bored