I too noticed that commercial, and thought it was funny in kind of an awkward way. Like others have mentioned, I didn't really remember what it was advertising, making it dubious as a way to sell any product.
What is really amusing is that it plays on the stereotype that big body=big penis and vice versa, which, as many of us here know, is a myth. In my own case, I'm only 5'5", but statistics indicate that more than likely my penis is bigger than any of the guys in the commercial. Obviously, one or more of them might be bigger than me, but that would just be coincidence. All I know is that I have put many football-player-size guys to shame in the showers. (Granted, I do have fairly big muscles if I do say so myself, but I had the penis before I grew the muscles.)