Horny Dash
"you see, i have a horn fetish and i was wondering if you could...shove your horn up my ass," rainbow said. "but we're not marefriends," twilight said. "and i'm not asking you to be my marefriend. i'm not ready to settle down.
Horny Dash Chapter 2
Ever since her experience with twilight, rainbow dash's horn fetish had only grown stronger. horn sex had become her new favorite sex act, replacing oral.
Virility Plague 4
Clearly the virus had intensified her horn fetish.... not that clark was complaining, that's what they were for right?