1.I just love men, especially pretty boys. And the love (sex) is more intense (as someone mentioned before). Plus, I think I might have some desire to be dominated.
2. Loveless anime was the first experience I had with BL, and I fell in love with Soubi at first sight. So that made me curious and craving for more pretty boyXboy action!
3. Apart from Loveless and Gakuen Heaven I haven't watched any anime, but almost all manga I read is yaoi. Of course Murakami-sensei's Gravitation Megamixes are FTW, but there is so much yaoi manga worth reading out there.