It's not a matter of whether or not I am personally offended by content. It is a matter of appropriateness. I'm sorry, but a baby sucking a man's pee pee isn't appropriate in any circle. It isn't an issue of personal taste in humor. Would you, for example, think it was appropriate to have the "N" word spray painted all over the ready room? Of course not, because the weird pleasure some idiot might derive from that does not outweigh the harmful message conveyed.
Interesting how you pose a question and provide the answer yourself. As a matter of fact I DO think using the "N-word" more often (But in a non-derogatory way) is to be encouraged. Words only hold power when people choose for them to have. Start using the word not as a curse but just use it, and it will lose its power as a negative word. Not being able to joke about a subject makes the subject taboo and risks not only the jokes, but discussions on the subject at large to be put in the shadow.
/Merf - Utterly convinced one should joke about everything.