You felt yourself starting to zone out as Papyrus continued with his repetitive ranting about spaghetti, then a thought occurred to him.

He looked down at you with a cheerful expression. "Y'know, there is yet another thing I haven't mastered." You glanced up at him again, expecting another rant about more pasta. But he didn't seem to be thinking about that. His expression told you that he had something else on his mind. "The art of romance!"