So remember when you feel a lack of confidence, you are not alone in that. I whip out the tape measure every now and again. It doesnt change much. It isn't going to change much. But they we have fingers and tongues right :)
I think this is very common. The lack of confidence thing, because we see mainly big cocks in porn. They however are the very rare people, and that is how they get the jobs. So the thing is who do you worry about. The people who say that the cock size matters, and bang on about it over and over...