No, it's exhibitionism. I dont actually get turned on by looking at myself, I get turned on by other people looking.
I guess that would depend on exactly what the person's mindset is. My girlfriend gets really hot when we're having sex infront of a mirror; but I don't think it's so much a "Wow, look how hot I am", as more of a strange kind of voyeuristic turn on. I realize it seems strange to be "watching yourself", but for some folks I think that's what it is. Especially if you can put yourself into a different frame of being and just watch/enjoy from this new angle.