Ah didn't know about the fact there is 100'000'000 men in the legally sexually active range, how is this possible - it has to be way more or not? According to google the world population is 7'800'000'000 people, so about 3'900'000'000 men and underage boys. How are only 2.56% of this adult men according to you? Seems unrealistic to me.
About the Western and Eastern Average I already knew about that, but since we are talking about possible 10 inchers in the whole world and not only in the Western World, I took the CalcSD Average. I mean, Asians are humans too, why should we exclude them from this calculation.