Just thinking... If I had to lose one of my digits, which would it be? The pinky would be my obvious choice. It doesn't do much, right? But as a bit of a metal fan, if I lost one of those then my devil horns just wouldn't be right. Which is the ring finger that you don't need? That might be the best option. What about you?
Right Thumb for us righties.... Could do to use my left ring finger too, why do birds insist on looking at it when you're out? They'd get a shock if there was no finger there and you could then go for a sympathetic "I was on Patrol in Vietnem" type tale to get them onside!!!