A Bunny Boiler is always a woman. Men are referred by other terms, but the term Bunny Boiler is used only for women.
Guy B: Oh man, that chick is a trip. I tapped that once and now she thinks we're married or something.
Guy A: How bad is it? Is she a Bunny Boiler?
Guy B: Yeah, she may be. This one is a psycho hose beast. I don't have any pets, but if I did I'm sure they'd be part of a stew right now.
Guy A: Hell hath no fury like a woman scorned.