wanna see something cool? Get 2 little or big sticks.. doesn't matter. Now... Let one be 20-30% bigger. and then compare them... the big one willl look like it is 60+ or double the smaller stick.
so.... if you are a man or women that **measured** ( reallly measured it with a ruler) a 5 inch penis. Then a few days or years later you saw a 7 in or 8 incher it would look double the size of the 5 incher. Thien that person would bet that it was 10" or more.
in reality it was much less!