Yeah cause its so much different. Your getting off watching a chick wack off a rubber cock. So it turns you on to see a chick with a dick wack off, so therefore you better off watching shemale porn. If your going to watch shemale porn, then You Might as well come out of the closet and admit that your a cock lovin little homo.
It's called Clean and Wet, and it's a clip from straponcum.com. They and Futanaria seem to be the only sites dedicated to this kind of thing at the moment.