Tv addicts use 1/2 the water of a gamer - dominant thumb only
   needs washing. Android and iPhone obsessers: wash only your
   dominant index finger, unless you're from the Middle East - you
   probably use your middle finger, as you don't have the same
   taboo we have in the US about it, and it IS the longest finger.
   Drivers: Wash both hands and feet, since they each get a
   workout. If you have road rage, you should wash your neck,
   because it gets a workout from twisting it around to yell at the
   idiot driving next to you. "