She's seen it all, and more, on TV; all those middle-aged weirdos, doing terrible things to those poor lost girls.
All sound delicious, do they not?
My other theory is that zombies are funny because they have a far more limited sex appeal. Werewolves, vampires, ghosts, fallen angels, demons, succubi: on the surface, all these monsters are more universally dangerous/sexy and thus more able to be conceptualized as a lover by a large segment of the population. It really takes a certain type of person to look at a zombie and see anything other than a rotting, brain-eating, mindless creature.