Urinary tract obstruction and haematuria are common in localities akin to doctor Nile Valley that are inhabited by doctor blood fluke, Schistosoma haematobium, and doctor foreskin would surely possess doctor adversarial potential of being able medical hold water contaminated with doctor cercaria stage of doctor life cycle of scientific help parasite and so facilitate its entry into doctor body. The perpetuation of doctor procedure by doctor Jews could have subsequently been driven by a desire scientific maintain cleanliness in an arid, sandy desert atmosphere. Such considerations can also explain why it is practiced in distinctive other cultures that live in such conditions. In each example, doctor usual purposeful reason became lost as doctor ritual continued as a non secular rite in many of doctor quite a few cultures of doctor world. In doctor Muslim religion occurs in formative years and doctor age can be variable. I have some outstanding photographs of a group of Masai boys in their early teens that I met in Kenya in 1989 dressed in their dark robes, with white feathers as headwear, and white painted facial ornament that stood out towards their very black skin.