Well, given I have 3.7 gigs of Touhou doujins means that hawt Reimu and Marisa are common. Fatchouli isn't so much hawt as something new and interesting.
The irony is great but you're missing the fact that some yukkuris pictures come from non-otaku males, like me. We just got excited by all the cruelty and sadism and decided to lend our artist talent to the scene.
I guess having such a perverse mind as mine means that anything with boobs could be considered attractive. But with all honesty, I would rather look at boobs than Fatchouli.