I swear bettas are genetically related to cats; whatever you *want* them to do or not do, they'll do the opposite on principle.
Dumped a bunch of juvie cherry culls in my betta tank figuring they'd make a good snack for him. Nope, they're breeding away while he's getting chased around the tank by a trio of bloody black bar endler males. He's such a pansy. But a beautiful one.