Why are us humans... we share the same similarity.. to bathe.. like the monkeys do.. do monkeys shower? I'm sure they don't.. People in poverty bathe I'm sure..
We all must bathe.. to be clean. It's to take care of ourselves.. something people don't do.. including I for some time.. when I cared not about myself.. "what's the point? I don't even want to get out of bed"
Has that happened with tribes thousands of years ago? I think not! Or they would get diseases.. But we have antibiotics.. now we become resistant to them.. not enough showering can cure that and, as we use all of the clean water.. the world will be in chaos.. it would be like a crack/heroin den and families would fall apart..