For me it's actually both. While I do have a sexual fetish for superheroines in peril, I also just really like the comics. I'm a huge comic fan and yes Supergirl and Wonder Woman do happen to be two of my fav characters (in my top 5). 99% of the time I'm able to bracket the two. The reason I like WW...

I. Supergirl

II. Sailormoon

III. Wonder Woman