Oh, YOU do not take offence! Great. But in a heterogenous group, there's bound to be mixed reactions. Sure, there will be other persons like you who would choose to enjoy the wit. But there will also be others who will choose to NOT get angry at that moment, but to get even later (as the cliche goes ). 555 Don't be surprised to find them later to be telling the same joke, but with the original storyteller's group as the target now.