I am a little surprised that no-one yet on this thread has mentioned blues man Texas Alexander's song recorded around 1927/8 which starts off with the words:

"My Gal's got something that looks like a boar hog's eye"

It doesn't take much imagination to work out what it is he is referring too unless you have never seen a hog or studied female anatomy.
Sorry I can't recall which song this is without spending a while going through my shelves.

Hoot