*Most of these links are NWS.*

     Looking in the mirror, it looks like I have a "Y" ass- the top of my bum comes together as a Y with a flat spot at the top, where you could rest a quarter flat in the top of the Y instead of having to put it on edge to make it stay. But TCB, most definitely, has an "I" ass- nothing interesting about it. Ghani says hers is an I, but thinks Y's are prettier. My roomate's is an I, Little[2]'s is an I, her roommate's is an I, my buddy MT's is an I, but thinks his fiancee's is a Y...
     Then, looking though porn and google pictures, I've only found one Y butt example. But I found lots and lots of I butt examples. Is the Y butt less common?