Ok, so there is like 2 different types of fan girls when reading and OTP fan-fic.
For me I fan girl over Yaoi fan-Fics. For an example, say your reading a fluff. And you're just like: "OMG THATS ADORABLE!!! YOU ARE SOME SORT OF ANGEL! >//////<'' Something like that.
Then you got like them fan girls who read a lemon/ smut fan-fic. They're just like: "*NOSEBLEED!* THIS IS HEAVEN! *Passes out*''.
Yea. Fan-Girls