Re: Does this make any sense?
I'm 20 and have erection problems too. I've seen 4 internists and one urologist. Of them, two said it was purely psychological (which was really a load of BS in my case, but that could be it for your bf) and did nothing. One was leaning towards psychological causes too but agreed to check my hormones and send me to the uro I'm seeing now. Another one tried to help figure out physical causes too..
I know there's probably more docs that would say it's psychological when you're only 20. But don't give up if it's in fact physical or apparently so.
Can he masturbate alright? How about morning erections? If he answers yes to both it's most likely psychological (stress, anxiety, etc).