Let’s learn about monster bodies,kiddo’s!
Monsters (such as Sans) can feel things like temperature, softness, hardness, pain, ect. However, it should be noted that monsters tend to have a much higher threshold than humans do. The magical properties of their bodies work to create a balance, providing energy when cold and relaxing when hot, hence why monsters are able to live and travel easily between extreme climates like Hotland and Snowdin without always having the proper attire.
So with that in mind, be cautious if a monster is running you a shower—what’s hot to a human is merely warmish to them!
Do monsters even shower? Yes! But whereas for humans, showering is part of a healthy routine, for monsters, it’s more like a convenience.Germs don’t affect them in the same way, but dirt and grime still stick on their bodies regardless, and showering is the easiest way to clean off.
Some monsters have more upkeep than others, such as Bear Monsters, who have to shower regularly to maintain clean fur. For a monster like Sans, however, he typically only needs to shower once a week or so. He’s a bit lazy with it, but does sometimes use warm (to him, anyway) showers as a way to relax his thoughts.
Injuries - Physical
Monsters can sustain physical injury, such as bruising. For most monsters, however, it takes a good amount of force or repeated hitting in one spot to cause a bruise. The area takes on a brownish, soft appearance, visually indicating that the magic maintaining their bodies has been weakened in that spot.
Luckily for them, bruises generally only last between a few hours and a day, depending on the severity. Even after the bruise fades, however, the area can remain very sore and tender for a bit. Sleeping greatly increases how fast they’ll heal!
Broken bones, on the other hand, are much less likely. The magic maintaining them is very strong, and even to crack a bone would take an extraordinary amount of power. The experience would be incredibly painful just for the crack; if the bone were to break, it’s likely that the monster is near death, as that’s a sign of severely low and unstable magic.
Injuries - SOUL
This has its’ own category as the type of injuries are actually different. This is where HP levels come into play! Being hurt physically and hurt via SOUL yield different results, so yes, even with his 1 HP Sans could stub his toe, get punched, or else hurt physically without dying. It’s only when the SOUL is exposed that he would need to be careful!
So why do monsters fight with exposed SOULS? Well, in all honesty, it’s not exactly intentional. Using intense magical abilities such as attacks can’t usually be done without exposing one’s SOUL. Though the exact reasons are still a bit unknown (just like with humans, monsters don’t know everything about themselves), most doctors have agreed that this is due to the fact that a monsters magic is based in a SOUL, that every magical property stems from it. So, harnessing that magic and manipulating it into an attack requires the SOULS active involvement.
I think that’s all I’ll put here for now, but if you have any further questions or curiosities, feel free to send in an ask!