Considering the two of them, perhaps ignorance is for the better. But lord, could you even imagine their hypothetical child? It'd be a sentient horror show.

Anyway, that feeling is because Sans is either bad at math or Mettaton, because Mettaton's sweeping forward to try and pick up the skeleton in a spinning hug attack anyway. "OOOOH DARLING, YOU'RE MY (SECOND) HERO!!"

Limbs! Glorious limbs!