It seems that almost any joke can find it's way into offending someone, whether it's a little or a lot; because the components for "Joke"usually mean that someone is surprised/duped/shocked - and someone else surprises/wins/shocks. The solution has been in front of us for millennia - Jokes which include human beings are GOING to offend someone to some degree. Given the recently invented "right not to be offended" the solution must be implemented forthwith - post haste - ex post juris nauseam - ad vomitora: All Jokes shall now be required to replace as their characters, BLOCKS OF WOOD and ROCKS. Sincerely - me.
...So this chunk of Mexican Ironwood and 2 chunks of Iraqi sandstone are in an Irish bar hitting on some Georgia Peachwood from a trailer park when a flake of San Francisco tiger's eye rolls in...