Danny Devito is naked and why?

Why does Hollywood do this? can someone please tell me? and the second question is why does Danny let them do this to him? well I may not get the answer, but darn that must be embarrassing to little people as Danny Devito get’s naked on the set of It’s always sunny in Philadelphia. The video is funny, but darn it almost reminds me of an episode of Jerry Springer: The Midget lost files.