What is the silliest/dumbest grounds for breakup rule you’ve heard?

I’ll go first. My boyfriend’s rule is if I ever tell anyone (my best friend/any family members) his middle name, he’ll break up with me. His middle name has been a secret since HS and he wants it to stay that way even though he doesn’t dislike the name.
What is the silliest/dumbest grounds for breakup rule you’ve heard?
Post Opinion