Ok guys. Within the past few weeks when I tend to masterbate my dick is not as hard as it can be. And when I tried to have sex with my girlfriend for the first time it was really bad because I could not get it up at all (no condom use). And in the pass when I am with her I am hard as a rock from just making out and foreplaying what is the problem? Am I masterbating too much? Also I have a stamina problem and usually cum within 25-30 secs. Before I went see my girlfriend that day I probably masterbated hour and half before I went to see her and again my dick was not hard. WHAT IS THE PROBLEM HERE GUYS?