OK here's what happen, first off I am a virgin. So I am with my girlfriend and we start engaging in sexual activities. First well I perform oral sex I have an erection, I stop it goes away, so she performs oral sex and I have a nice erection. Then I put the condom on and by the time I go to insert it in her, I have lost my erection. I have never had a problem staying hard. I think it could be because I was so nervous, cause I was. Any help would be appreciated.