Ignorance. Indian Hindus do not circumcise their sons. Neither do Chinese people. Or Europeans. Their penises are all fine. You probably know many people with

Ignorance. Indian Hindus do not circumcise their sons. Neither do Chinese people. Or Europeans. Their penises are all fine. You probably know many people with pet dogs. How many of them have circumcised their dogs? How often do the dogs shower? Do they get horrible penis diseases? No. Of course not. (Seriously, have you ever wondered why dogs don't have a glans sticking out? Or horses? Or any other mammal that doesn't wear pants? This is staring you in the face.) Nothing is going to accumulate under your foreskin, because it unrolls every time you have an erection. That's the point, actually: The sensitive inner skin unrolls to cover the shaft of your erect penis; that's what makes it sensitive. If you are circumcised, what happens instead is that the hairy and insensitive skin from your scrotum and abdomen is pulled forward over the shaft instead. If you have a really strong erection this will actually hurt, as the skin is stretched too much; there is nothing to unroll. This is staring you in the face. If you have any experience of penises -- perhaps your own -- then you have actual evidence you can see with your own eyes. Have you ever had a sex partner who wasn't an American? I think these beliefs persist in the US largely because of insularity.