In the past 5 months I've finally managed to attract some girls n get them in bed. But every time I go to put on the condom, I cant stay hard...It immediately kills the mood with the girl, n leaves her a little more than unhappy. When I finally got with another girl it happened again, and then with the next girl...Im only 19 years old, so I feel like this should definately not be happening. Its killing my confidence...please offer any advice you have.