[Mettaton smiles again, reaching out to put a hand on Papyrus' shoulder.]

Sweetheart, it's fine!! Just because I couldn't feel things the same way you could doesn't mean it didn't every bear significance! A hug is always nice! And robot or not, I would like to think I gave excellent ones!!

[Of course, part of the allure was having extendable arms, but it was still a good tradeoff. He couldn't hug like he used to but he could feel the warmth!]