I find that guys that FEEL they're lacking (whether they are or aren't) try their hardest (ho ho

) to make up for it in other areas like digits and daty, for sure.
Penis size, to me, means very little. It really is what you do with it. I've had incredibly painful sex with guys under seven inches, and completely comfortable sex with larger.
What I think people forget is the vagina is only 3-4 inches long itself, and stretches to accommodate what you put in there. It's also a pathway of muscles, so it goes back to what it was (the myth of "stretched out" always makes me roll my eyes) too.