Theres been a couple of times that I have been with a girl that my dick has let me down. Had a lot of fun foreplay, with a perfectly hard erection, but then comes to penetration and as soon as my dick touches her pussy, it goes soft. It has been really embarassing. It has only happened twice, and can't understand why, because 99% of the time it is perfectly fine. Needless to say, with the girls that have experienced my problem, I didn't see them much afterwards.... Has this happened to anyone else?