Yeah I bet you guys all have slongs that size. I wouldn't worry about it mate. Men in Porno's are chosen for having big ones.
I look at my penis and think it's small, when it's flacid it's tiny, when I wank it's about 5 inches.
In front of girls it grows an extra inch or two, must just be the adrenaline rush I suppose.
Trust me, one self conscious guy to another, if you can charm a girl and not feel embarrassed about your penis, they don't seem to mind. If you can keep it going smoothly making sure the girl orgasms, and you perform well in foreplay, you will have nothing to worry about.
I've had only one girl say that my penis was small, that was when I was 18. She rang again later in the week to see if I was available.