Im pretty sure most of these guys go to a doc and have scar tissue removed every so often. They must because you dont see anyone with huge scars like greg valentino.That Idiot.METHYL
I have gotten into the habit of looking for scars on the pros. Especially in the glutes and the delts. Check out M. Ruhl's left delt and R. Colemans right one. Sure fire evidence that the boys are using pretty hard to show visible scars on the outside too.
I know how hard it is to push a spike in my ass once in a while and I am far from a heavy regular user. I bet trying to spike themselves in the ass is like trying to push a needle through cork. OUCH!!!!