Hello, I'm 19 years old and been in and out of serious relationships resulting in sexual intercourse. I've never had a problem getting hard until this past weekend I could not get aroused by my current girlfriend. I didn't worry at the time till the following week when we were about to have sex I couldn't get hard. While feeling ashamed and guilty I was very upset. I don't really know what's going on and this is all new to me. So I did some researching and narrowed down some of the reasons I could have a "limp" penis: Regular coffee drinker Occasional dipper (chewing tobacco) What I don't understand is I have no sex drive at all, not even to masturbate. I have scheduled to see my physician next week but I was wondering if anyone could offer feedback/similar stories that could help me out Thanks