I guess it depends for me. I've posted many pics of my dick on the internet (not proud of this at all, by the way) and people generally have thought of it to being largeish. When I look at it though, sometimes I'm kind of upset because it seems smallish but other times it doesn't seem that way at all. I think a lot of it has to do with my tall frame. I'm 6'2, I also have very large hands so in comparison, it doesn't seem that big. Speaking of my hands, the only time I really realized how large they are was when i passed out in an awkward position where my hand fell asleep and was resting on my head. When I woke up, I freaked out because I thought someone else's hand was on me! Feeling it the way someone else feels it made me realize how truly big they are. Having awareness of this has helped me have a more realistic perception on my cock, I think...I don't know though, maybe I'm just talking out of my ass.