Discontent jokes

Why do some couples make their status "single" after a small argument? Like, I don't put "orphan" after I get into an argument with my family.

I can't stand being in a wheelchair.

I’m giving in my two week resignation to life... it’s not you ... it’s me!!!

I hate my wife.

My kids are so ungrateful. I got them a new dishwasher and they just won't stop complaining about their mom.