"Not unless you count my wife"

Boomer hating-my-wife "jokes" i.e., misogyny will never be funny to me.

I work at a park and I'm checking in a customer's camping reservation. As I'm going through their reservation they have no pets listed so I ask, "do you have any pets with you?" because people forget to add them all the time.

The boomer replies, "no, not unless you include my wife." And starts laughing but I didn't laugh along with him and just made a 😐 face.

He could tell I did not think his "joke" was funny and takes his permit and mutters a "thanks" and walked out of the office.

I really don't understand all the men hating their wife jokes because I hear them a lot and just want to tell them, "if you hate your wife just divorce her, bro" but I can't