The back of my G creeps out of the back of my jeans only when I sit because the jeans are very low or because though they fit my caboose, are loose in the waist.
But I have NEVER pulled my G out of my jeans on purpose. I have heard about chicks doing this and it sounds like it is as dumb as the guys who wear the droopy drawers with their boxers pulled up to their skinny chicken-ass titties. LOL