Normally my erections last 10 seconds 15 if i'm horny I had some weed brownies and smoked a blunt and could maintain an erection for over a minute, I recorded it just in case I was tripping, it was rock solid, didn't go down gradually as it does, that was until I got up and then I lost it straight away, again, Is my problem physical, mental or both? how is it possible that becoming high made my erection not deflate? Also why can I not maintain or it is difficult to get erection whilst standing? conditioning issue? I am 21 years old, don't get morning erections