At an old job I said something in the work chat like "for fuck's sake, it returns 200 OK when there's an error!"

One of the managers responded "language, please."

So me, an asshole, started using "fudge" instead of "fuck" everywhere. "That endpoint is fudged up and we should change it".

They "let me go" a couple months later, but now I make twice as much money doing more interesting work, so that worked out. They can go fudge themselves.

To actually answer, I imagine for some people it calls up imagery of fucking, and that makes them uncomfortable. But that seems like a them problem. I'm not very sympathetic on that explanation.