Feet are just so gross. Think about it- feet rhymes with meat, cheat, beat, neat, seat, etc. If you were to go through each of those words and relate them back to feet, you'd come back with some very abstract- yet confusing phrases.
"The neat meat of your feet beat the smell of your seat, you cheat!"
Yea, umm, the girl to the left of me is at least wearing her socks!