The great debate...to wash or not to wash

Curious on the opinions of the masses out there.  There's been a debate stewing for some time within my circle of friends on why men should wash their hands after using the restroom.  I'll try to keep this as PC as possible but the argument should be that your hmmm, little member sits around all day nice and clean.  So if you wash your hands after handling him doesn't that imply that he is dirty or worse that you managed to pee on your hands somehow.  I mean you tell me would you rather shake hands with someone who has a dirty p-unit and washed their hands or someone who has a clean one and didn't wash their hands.  Just food for thought.