alright so this is probably my first actual post on here. long story short...occasionaly, and i dont know why, i can't get it up. i'm 23 years old, with no health issues, and i don't know what to do. it happened alot before i lost my virginity, i think probably because or nerves or what not. but after i started having sex..alot..it wasn't really a problem. it's been a little while since I last got laid. but a few times recently i get hard, get blowjobs perfectly hard, but then when it comes right down to it...it all of a sudden goes soft. it's really disappointing and embarrassing, and i don't know what to do. its so embarrassing and i don't think there's anything wrong with me, because i used to have sex all the time. now its happened to the same girl twice in the past week. who knows what the hell she's thinking, and i just want it to stop! anyone with similar problems who could help? or any advice?! anything would be greatly appreciated!!!! ahhhh.