I would say Idol*Idol (m*f) = most realistic could happen in real life thus no need to read about it on AFF XD
Idol*Idol (homo) = least chances of happening in real life hence should be read on AFF
Idol*OC = for delulu oppalogists who want to believe that oppa will end up with us, can't believe I write and read this kind the most XD

@--sKYE-- hilarious XDDD

oc is for the weak