Lots of men’s humor involves a cartoon punching pregnant girlfriend/wife in stomach to force an abortion as it’s inconvenient for the man.
It generates laughs and it goes on to the next meme. Very common theme.
That excuse gets thin after middle school though.
If you’re 13 and laughing at this stuff, alright. If you’re 25 and laughing at it, there’s something wrong with you. If you’re 40 and laughing at it, wtf dude. etc.
When it’s “Oh, haha, you’re not supposed to joke about that”. It’s nervous laughter. But if it’s deep laughter,, there’s some sociopathy going on.