Every time my 17year son takes a shower, he leaves the shower smelling like b.o. very badly. He is the ONLY one in the house that does this. I don't understand. The only thing I can think of, is he isn't using soap. He doesn't smell bad during day, when I sit next to him, etc. JUST SHOWER, LIKE THE ENTIRE BATHROOM. When I ask him if he uses soap, he says yes......so I am COMPLETELY CONFUSED.