I know what you mean. I too have discovered many new things about myself. I didn't know I had an ass-fetish before now.
Maaan jackass is INCREDIBLE
I had an ass fetish way before reading yaoi... now I'm ashamed xd
I know!!!!!!!! Love it!!!!!!(≧∀≦) <3
And even if you had a fetish already yaoi made it worse
Yaoi mangas make me realize how many fetishes I have... Tattoos, beauty marks, legs + pantyhose (thanks to 'Jackass...') and now, finally ass fetish. One more doesn't matter I guess... :P