Can you please do Papyrus and Sans (and their underfell and under swap versions) reacting to an so who likes to bite as a sign of affection?
I love the thought of them just trying to go about their day and then chomp
UT, UF, and US skeles with an S/O who bites to show affection
Undertale:
Sans:
PLEASE warn him before you do this the first time because he will 100% freeze up if he isn't prepared for it
After he knows why you're doing it though, Sans can't stop himself from laughing at it
He appreciates it that you get so overwhelmed by your affection for him that you can't show it in any way but biting him, but he's going to teasingly offer other, less startling ways to express it
Kisses? He can do those. Picking him up and spinning him around? He can handle that. Biting him? Now he might playfully scold you for catching you off guard
Once he's used to it a little more, he learns to pick up the signs of an incoming bite - and he'll absolutely try to make jokes and puns to throw you off
Papyrus:
After his initial shock passes, it very quickly becomes a competition to see who can out-do each other with over the top affection
Papyrus grabs your face and rubs his all over it in the best approximation of a kiss he can manage, all while laughing the entire time
He might offhandedly compare you to the royal guard dogs who have tried to take off with his bone attacks, but anyone can see the playfulness in his eyesockets
It startles him every single time that you bite him out of the blue, but every single time it ends in him gushing about how much he loves you too
Underfell:
Red:
Oh boy have you opened up a whole can of worms by doing this
Red will very quickly see it as a challenge to see who can bite harder, and believe me when I say that he will win that little battle
It gives him a good laugh every single time you chomp down on him out of the blue, and no matter when or where it is, he makes sure to return the favor with equal eagerness
His teeth are sharper than most, which usually ends in some minor accidents, but he will always always make sure to clean up any blood and make it up to you in some way or another
The go to is usually a trip to Grillby's with the promise that you'll be allowed to get everything you could possible want
However, neither of you are surprised in the slightest when he takes a good few bites of everything you get, saying that he has to make sure it's up to his standards
Edge:
The first time you do this to him, it startles him so badly that he lets out the most undignified shriek he's ever made in his life
He'll scold you while his cheekbones are practically glowing red with that flush of magic you adore
While he doesn't scream after that first time, it flusters him so so much every time you bite him
Despite how much he claims to hate it, you never see him actually try to stop you, but you do see the way he lowers himself down to your level to make it easier for you to reach whenever he picks up on the signs that you're about to bite
It isn't uncommon for him to very quickly speed off to clean or train after - his usual way to calm down after something manages to fluster him
Underswap:
Blue:
He immediately freezes up every time it happens, only to break out in a fit of muffled laughter
"IS THIS WHAT PEOPLE MEAN WHEN THEY TALK ABOUT CUTENESS AGGRESSION? I KNOW YOU LIKE ME, BUT I DIDN'T KNOW YOU THOUGHT I WAS THAT CUTE!"
No matter how many times you do it, he somehow always knows exactly when you're planing to sneak up on him to chomp and to show him how much you love him
Blue might tease you a little bit by saying that he's not a chewtoy, and might even offer to buy you those little rubber necklaces for you chew on if you really feel need to
Stretch:
He's another one of the skeletons who audibly yelps every time you chomp down on him, but he finds it endearing
You feel so much affection for him that you can't think of any other way to show it but to bite him? Oh, he thinks it's the most adorable thing in the world
If he has the chance, he likes to flop himself on top of you like a very bony weighted blanket, saying that you're in time out
He might carefully bite back to get revenge, but it's never enough to really do anything but tickle an make you laugh
















