Family guy

I recently watched family guy and thought"wow this is really offensive".But that show somehow finds a way to be hilarious.How do they do it?The show has been on for years and it has been cancelled twice but it keeps coming back.Is it that we like shows that take use to the edge?There are even spinoffs 3 to be exact.I personally love how the show is close to reality but its just really sarcastic.Anyway the show is awesome and it will most likely be on forever.