I think there is a lot of money to be made in the promotion of creating "germ free" environments, and excessive hand / body washing. We all know that this is bullshit, and I personally believe that attempting to create such environments is likely to result in a weakened immune system. That said, washing your hands after taking a shit / piss is common sense. However, in the pubs in the UK, you see a lot of disgusting fuckers who do not adhere to this.
Washing religiously, everyday, is pointless, if unwarranted. I wash as required, which results in a bath or shower 6 out of 7 days a week. Teeth, on the other hand, get a good floss and clean everyday.