I stated that although I abhor promiscuous women, I will keep that opinion to myself. If I keep it to myself, what is the harm?
Holding opinions like that makes you an asshole, no matter if you keep them to yourself or not -- but please, keep them to yourself.
Actually, you're the a**hole. We all have certain thoughts in our heads that we would never act on. That is like saying that a man who has a rape fantasy is as much of an a**hole as a rapist.
Holding bigoted opinions doesn't make you as much of an asshole as people who actively discriminate because of their bigoted opinions, but it still makes you an asshole. And having a rape fantasy is completely different from thinking that women should be raped.
Also what ListenerX said.