OP , tell us more about your grandpa serious . <| sep |> It ' s weirder to do that than not to . According to Professor Stephen Shumack , President of the Australasian College of Dermatologists , you should only shower when you need to . Speaking to the Sunday Morning Herald , he said It ' s only in the last fifty to sixty years since the advent of bathrooms with showers that the idea of a daily shower has become commonplace . The pressure to do that is actually social pressure rather than actual need . It ' s become popular because of the social need to smell good . But it ' s only the glands in your armpit and groin that produce body odour . They ' re not all over the body . Shumack also warned that a hot daily shower could do more damage than good , saying Overwashing causes ' defatting ' of the skin getting rid of the natural body oils we produce to protect the skin cells . This can cause actual damage making them more permeable to bacteria or viruses , precipitating itchy skin , dryness , flakiness and worsening conditions like eczema .