The episode where Joey is going to be the butt double for Al Pacino he gets in the shower supposedly naked. If you look on the wall of the shower you can clearly see the shadow of his boxer shorts (or possibly a swim suit).
Not only can you see the shadow, but at a certain time you caan also see the very tip of his pants!! (I think maybe we have been analysing this scene a little too much!??! hehe...you can never get enough of Matty!!
That was a completely different episode -- that one is where Joey has to hurry to the studio and he smells like fish from a fishing trip and sneaks into the lead guys dressing room. The one they are talking about is where he has to be in the shower.
well he is only wearing boxers because he probaley dosn't want to be in front of the camera completely naked. I'm sure you wouldn't want to be naked in front of the camera too. It isn't that big of a deal anyway it is a miner mistake