Yeah, I’ve only ever seen it used as an admonishment against someone. Like, someone says something rude as fuck and they get told “don’t yuck someone else’s yum” … which, isn’t terrible, when it’s advice being given to people acting like children.

Saying “I don’t want to yuck your yum, but, the thing you like is blah-blah-blah” could easily be changed to “I’m an asshole and I think the things you like are blah-blah-blah” and the context of what was being said wouldn’t change.