I know exactly what you mean. I'm 7" and I know I'm slightly bigger than average. But due to self perception, I sometimes feel as though I'm not as big as I think. And seeing some of those dudes who claim to be 10, 11, or 12 can make you feel small. But as Geordie182 said, there's a lot of fakers floating around here. Everyone who's seen my cock tells me I'm big, it's just when I'm flaccid that I feel small.