(2) Smegma.
A quick image search of that word on Google will make the most hardcore of the "leave it a Cavalier, versus Roundhead" crowd convert...
I guess medical opinions are varied, then. I lived (as a housemate) with an 40-yr. old American doctor who was the third boy (and the 8th child) in his family. He has a younger brother, too. He told me he wasn't circumsized when I asked him when the procedure became routine practice in America. I asked how that came to be. He responded, "Because my mother loved me very much." Apparently, his oldest brother's circumcision traumatized her so much, she never had it done again. He, as an adult and a doctor, strongly denounces the practice.