I didn't find much of it "hilarious". Far too self congratulatory IMO. The South Park skit was funny, but then for that I could have just watched South Park. I liked the female comedian who inverted the joke, told a sweet story, then when asked what the act was called..."goat sucking, mother ******s". The few other genuinely laugh out loud moments didn't actually involve the joke being told.
The language may be toned down but every comedian uses incest and bestiality jokes nowadays, it was hardly risk taking. If they wanted to do that, racism would have been the way to go, or even chuck in a few Holocaust gags.
It's also interesting to see where actors like Martin Mull & Andy Richter - who are best known for fairly tame comedies - came from.