I've seen the ultra death fats type before.  They hold a pencil in the ham hock they call a hand and poke at the keyboard.  That was a long time ago.  The really sad thing it that there are now keyboards that cater to fats.  I don't know if they were designed for people wearing industrial gloves or people lacking motor skills due to some disability, but you know that porkers are using them.  The keys are 1-inch square.