ut + uf sans and us + sf papyrus reactions to their s/o laughing so hard they get the hiccups?
UT!Sans: He snorts when he laughs too hard, you hiccup. The two of you push each other to the breaking point, ribbing one another, unable to even get a word out. You both look like you’re dying.
UF!Sans: At first he’s a little worried? It’s probably the first time he’s seen this happen so he’s taken off guard. He’ll tease you about it while trying to contain his blush over how cute you are.
US!Papyrus: He finds this hilarious and loves to push you to the breaking point. It’s sort of a game to him. If he can get you to hiccup, it's a win in his book.
SF!Papyrus: Whenever you do this he just sits there quietly, watching you with this utterly adoring look on his face. You’re adorable and perfect and stars he’ll never get tired of hearing you laugh.