Now that would come in handy!
They should actually look to add a fourth arm, and make some money with him as a circus sideshow, "octopus boy."
Recently I read a very interesting book about not automatically separating Co-joined (aka Siamese) twins just so they would be like everyone else--and able to have private sex lives, albeit in some cases with reconstructed sex organs.
In this case, I think it might be wise to wait a bit to see which left arm had more function. Acting quickly for the sake of instant "normal" could be a big mistake.
Yes, you don't want a situation where the left hand doesn't know what the right is doing!
That's all fine and well, but which left hand?
Maybe they could do rock-paper-scissors and keep the winner. That would be an even-handed approach!
I'm afraid that three's still a crowd.
