... we are technically "just friends" he has asked me what I think about "us". But that's besides the point. One day he invited me to come with him to his dorm room (which is all guys) and I said no. Later he asked me why I wouldn't come up to his dorm room. I said something about it being because I'm Catholic, but I was unable to give him a good reason. I know its not a sin to visit a guy's dorm. My question is why exactly shouldn't a girl visit a guy's dorm?