I have had sex with my girlfriend a few times and every time i have problems ejaculating.... i mean the sex is great she gets me up preety good and it feels great while she is on top of me but it takes me too long to ejaculate.... 3 days ago we were doing it in the drive in and it took me the full length of the batman movie to ejaculate that movie was between 3 and four hours long....

any suggestions?