When Dr. Odd was little, all he wanted for Christmas was his two front teeth.
So, he built a pandimensional gate that allowed him to travel the multiverse.
He’d surprise his other selves with a hammer, and he’d collect the teeth in a burlap sack.
Pretty soon, he had all of the two front teeth of his other selves.
Even the ones from his dead other selves. Those, he just dug up their graves and took the teeth.
As he tried to return home, the gate broke down.
All he wants for Christmas now is 100 grams of Plutonium fuel.