Actually their culture has a strong emphasis on personal hygiene, they just believe that perfume is "cheating" and prevents you from knowing whether you are truly clean and odourless or not. Arab sailors in the mediteranean sufferred less from disease than europeans as they would take baths in the salt water once a day. Muslims are supposed to wash their hands and feet before enterring a mosque. The Egyptians invented mint toothpaste and the idea for baths came from somewhere in the east.