Of course it's natural. Humans would have been doing it for eons if it weren't natural. You do realize that anal sex was the primary method of contraception before condoms came along don't you? Not to mention, many people believe it feels good. What is it they say, "Millions of people can't be wrong".Veryvermillion: Nobody is questioning the CDC survey, the point was that it's not a natural act, doesn't matter who is involved, straight or Not straight. Do you believe it's natural?
I would go into detail about the "male G-spot", but I think I'll let you Google it and learn about it on your own.