Truants do it absently. Truck Drivers have bigger dipsticks. Truckers carry bigger loads. Typists do it in triplicate. Typists do it with their fingers.
TV evangelists do more than lay people.
UNIX don't do it. Undertakers do it with corpses. Unix wizards do it with unchecked conversions. Ushers do it in the dark. Ventriloquists do it with ther mouths closed.