Yeah, I was thinking more of brain-swapping and whatever when I wrote that. Still, they share a lot of the same story conventions.
Mystique is probably a serial-rapist by that (or any) standard, but is that ever brought up? The X-Men usually get annoyed at her impersonating a significant other, but it's never played that seriously. I mean, she basically raped Iceman in her most recent stint on the team, but it's never been played that way.