i used to have a kiwi colleague who according to him neer used a soap/shampoo/cologne in his entire life. his blonde hair always looked a bit lifeless. he said he was against all chemicals and used only water when needed.
he used to sit beside me, less than a meter away.

i also had a german colleague. i dont know what he used or did not use but he had a serious BO problem. we never moaned about these guys of even brought BO issues up.

oh not to mention, london tube, monday mornings, every other person had a bad beer breath. yuck!