Well, if you worry giving your girlfriend an apron with a superhero motif might be insulting, here's an alternative. Costume Craze has begun making corsets with superhero motifs.
Why do I get the feeling that, if it weren't for the squick factor, we'd have seen Evangelion corsets first?
I know superheroines in comics have always had a sexual component to them. But really, isn't this taking it just a little too far?
Any day now, I expect to find a link on the Internet to a superhero-themed bondage harness. You KNOW someone's making them.