When your husband can’t afford a punching bag, he uses his wife.
Wife Punching Bag
Explanation
Explain Bear
Listen up, buttercup. This "joke" is about a dude who's too broke to buy a punching bag. So, instead of hitting the gym, he hits his wife. It's what we call marital abuse. It ain't funny, it's messed up. Just because you didn't get the joke doesn't mean it's clever, sometimes it just means you're slow.