Originally, the cult, but now.....sex. MM sex, of course. I think of Mana with the chick (which I could never figure out- was he trying to prove that he was straight, or pretending to be lez?), and of Gackt staring at the two guys and ignoring all the women (and because of that, I've had doubts about Gackt's sexuality ever since....). :?
Oh, and eyeballs. One must never forget the eyeballs.