I have been going out with my girlfriend for almost 2 months now and she has given me head twice. Both times, i have not had a full erection and both times i was not able to get off no matter how long she spent. I am wondering...since i have had a full erection while kissing her and playing with her before she gave me oral sex (and then it subsides) is it that we just spent too long kissing so that i shrunk down again and wasnt hard? Is it because before this relationship i would masturbate almost daily to porn? (which ive stopped)....what is it? is there something wrong with me here?