I turned 19 no more than a month ago and am already having difficulty becoming erect, it seems to have been quite some time since I’ve had an actual “full”/throbbing erection. I’ve had this problem during masturbation, and even in cases where I’ve been w/a girl. Twice so far in recent history, I’ve been unable to have sex w/a girl b/c I couldn’t get hard enough. There have been days where I’ve slapped the thing around for 15-20 minutes and haven’t seemed to become more than 30-40 percent erect.what can I do? What might be the problem? Does anyone else have this problem? How abnormal is this?