This is probably not original at all but I headcanon that Togruta bite as a form of affection when they’re happy with their situation. It’s also a way they express positive feelings when words aren’t enough. Biting can be LIGHTLY territorial as well (It is for Uvosee and he wont ever say it), but that’s only for the jealous types.
In adulthood,it’s typically done between couples and it’s also common between close friends. Signs that it’s about to happen is when they’re far clingier and warmer (I also head canon they have body temperature lower than humans) than usual.
In Adolescence, it happens all the time. Kids just do it unexpectedly when they’re super happy or like something. Bite marks everywhere! No signs for them.
Also yes it hurts like hell for humans, they’re carnivores with sharp teeth.
The aftermath:
Unfortunately for Avello doesn’t know and just thinks his husband is trying to embarrass him. He’s usually good on avoiding it but every now and then he (foolishly) trusts that his partner wont “attack” him and lets his guard down. He is very mistaken! Uvosee is just a happy guy!
Thinking about pushing daisies… there will NEVER be a better show. There will never be any characters ever that love eachother more than Ned and Chuck they are EVERYTHING to me