Being a professional buttocks model, I often meet people who don't have the best of intentions. Most of the time they just want a quick pinch, which doesn't bother me as long as it doesn't leave a mark.
Recently, something more sinister has been happening. I've had requests for butt imprints. This seems innocent enough, but there is a huge market for counterfit butt models! Besides, who wants to sit naked in plaster of paris?