UBV169 Let Me Show You, starring Harry and Mark. NEW RELEASE. Harry thinks he’s being helpful, offering to show Mark how to do his exercises. After all, Harry’s muscles are much bigger than Mark’s. Mark is a sensitive soul, and he takes offence. Poor Harry gets knocked about, only managing to get in a few moves of his own. Mark ends up tying Harry to the door frame for a last few minutes of one-sided abuse. This video is 47 minutes long.