MK9: I'm not as hung as many on this board are, but I think I can share my bit of experience here.
Well I'm talking about more than 30 years ago, but I think I was just 13 when I read that the average adult erection is 6", and I was already 7". Then at the sea, tiny briefs were on fashion in the early seventies, and I couldn't help notice that I showed a bigger bulge than most adults, even if balls were surely not as big as now.
Before turning 14, individual doctor's visit at school, I was laying while I heard him say to the assistant something like "Hey, look at this" while holding my underwear band, then he wrote "advanced sexual development" on my report.
Later on, at 15, when I was about 8" erect - but not thick - and 6" flaccid, at the locker room, someone started calling me "satyrus", and I started noticing that I wasn't ashamed at all of my nudity with other people ;-).
On the other hand, I was very shy with girls, a real nerd, but I noticed that they were holding me tight when dancing with me, and were pleased to feel my size - a couple just fell in love with me for my crotch - I knew later...
Another thing I remember is when I had a pair of used light color blue jeans from a cousin, I liked them so much but I had to quit wearing them as I looked just obscene...
Then came 1980 with nude beaches everywhere, comparison was obvious, though it confirmed what I noticed on porn magazines: someone looked bigger than me, a few much bigger!... however, I remember two boys walking on the beach, I had a fat flaccid for the heat, as they saw me, one of them made a loud mimic of making a knot !
It was during my duty that I experienced the power of size in relations, after the first communal shower, well I have been parading it a bit, noticed some furtive glances, and from then on, I got the impression of more awe and consideration...
Now I'm almost 9" long and 6" around, and more than 7" flaccid, thanks to jelq and other PE exercises - I wish I were aware of them 25 years ago, it'd be more fun ! - and I'm used to crotch watcher babes, crotch stares - hey look at my eyes...- and sudden silence when I enter the shower room, but it doesn't look big to me !