You have probably been in contact with lots of unhygienic stuff during the day, so why not wash your hands anyway?
Personally I think washing your hands should be done before and after :)
Agreed. If your "penis is cleaner than your hands", why are you contaminating it when your hands? Or, you could wash both after.
Microscopic particles of fecal matter can be carried in your sweat from your anus onto your penis. You should wash your hands.
Ummm... We wash our hands regularly to promote hygiene.
Do you wash your penis as often as I wash my hands?
On the other hand you're touching dirty stuff (like keyboards, or doors in public places) with your hands much more often than with your penis.
One would hope.
Yes, and I wash my hands also. But consider that you don't often shake penises as a greeting. I presume the GP's theory to be that a penis doesn't need to be washed regularly because it seldom contacts foreign bacteria.