Well your at Greenwich Uni so enlighten us

seriously we don't downgrade other mens sizes to make us feel better, I for one dont do this or even have to with my size. What I do is view the image or video rationally and not with emotion like some. A 9 inch plus penis in length is rare and angles to play tricks as has been proven with studies across the board on perception of seeing things along with a thread we have that shows how large a 7 inch penis can look.
Many adult entertainment stars are smaller then they are beefed to be because they need to have this 'superhero' like status. Camera techniques are used, pumps nearly always along with on occasion surgery and just downright deception. Yes some guys in adult entertainment are in fact large but its very rare to find one who is without altering it in someway or who hasn't done penis enlargement at all.
10 inches plus is something very rare. Mandingo isnt even 10 inches but very close. I have used several shots of him, his penis and women of different races with average hand sizes taken into account and came to a very generous and believable 9.7 inches. Remember as well some guys are small builds, they shoot with even smaller women to enhance the size more.
I a realist and not taken in by the myths of adult entertainment and the sizes we are fooled into believing as kids.