I'm 18 years old,and yesterday i did sex for the first time, but my dick was "soft", because i was scared, i was scared for this problem, the problem was the anxiety, i asked at myself: "and if it not became erect?", thinking at this fear, it really not became erect... so my girlfriend started to suck it, and when it was erected, she sitted as quikkest as possible on my dick, and so we started to make sex... but after 2 minutes, i thinked "wow, i'm doing sex!", and my dick... getted down, how i can fight this problem? Thenk you for your help, and sorry for my incorrect english, but i'm italian...