My guidelines for telling jokes is:
Would my mother be embarassed if I told them in front of her? (Though most of the time, she has "dirtier" ones.)
Should kids hear it?
If it fails one of the two guidelines, then "Bunker" it.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)