Viagra gets me hard as a rock, but only when I am laying down, relaxed. I was in a position this week where a female coworker (unexpectedly) dared me to show me her cock, she said it looked like I was packing. It was pathetic. My cock could not get hard at all. I actually took Viagra before going on an outing again, and it STILL COULD NOT GET HARD. On both occasions I was very nervous. However, even when I am not nervous, when I stand up.. my dick goes limp. In the last year I have gained about 50lbs for various reasons but mainly because I can't fucking maintain an erection with what I would like to think is a formidable tool. I'm 31, about 280lbs, 6ft. I take Centrum twice a day. I do get fucking huge-ass morning boners.. but who doesn't right? HELP.