Mort is like, okay, it's cool that you're in a burlesque show buuut that whole bit where you've got insight in my feelings is kind of not cool, mkay? If she'd show she knows more about how Mort feels, he'd definitely avoid here.
Mort would love Frank, just for how novel he is! Mort wouldn't mind the snakes much either, though he has never died of cobra venom, so that might be cool to do as well. I'm not sure whether they can be friends, but Mort would definitely be friendly.