I don't have a clue what the episode is all about but try to keep in mind American television is still heavily censored and 'dick' is actually a very offensive term on 9pm television viewing. I could be wrong but I'm pretty sure the show would have to be on after 10 [and possibly a smaller network, but that may not be remotely true] for him to use 'asshole'. The choice of words may simply be a nod to what they're actually allowed to say.