good asking!! i've also wondered this too....
i never sleep with men, and i rarely see men in full erection that close (except my dad's morning wood), and of course even measure it, except some of my close friends and some friends at the gym who wanna show that off, which are mostly 7+, or 8 max. (just claimed, never measure as well). never seen those 9, 10, or so..
even my boss who always claimed he has his pride nine, i once butted into his room accidentally with no idea he was pounding a girl inside. i thought it's just 1+ inch longer than mine, that means it's around 7+ or 8 max!! not 9 as he claimed or (sorry boss) boasted!!
and i really wonder who was born really hung without working it out with those pills, tools, pumps, rings, and whatsoever ways to enlarge it and show off on the net... sorry, that i'm quite str8 to the point and i don't have any intention to blame on this business on anyone, just wondering.
i was in australia during my teens and saw some really hung guy at school, when changing or in the shower, those semi (not sure some might at his full glory) were not much longer than mine when erected. so i just really wonder who is really born hung without any touch up..
a close friend of mine who is australian got 7+, it looks really huge and heavy, that i never measure it up too. just estimate from some closed circle jerks together.. with other 3-4 friends.. who are around my size 6+.. so again, i really really wonder that too ...