CNC c!quack and ctbo therapy ? Not really but Tbo acts like schlatt and makes love with big q (he actually really does love q, but he has to keep it a secret cause he's afraid that their thing wouldn't last). It really did hurt tbo to act like his abuser and abuse Quackity (even though it was all consensual).
Though after all phases of lmanburg he was left all alone, cold and desolate like his commune. Until he found Sapnap. Apparently the man was lost and trying to find Quackity. The name made him flinch, but he offered sapnap relief. He even shapeshifted to have wings like Q so sapnap could play with them having sex.
The last person he found of the fiance's was Karl. it seems as though he lost everything as well. So they live together in peace with a few fucking sessions
TL;dr 2 times tubbo is used to replace someone and the one time he felt love in a lost person (you can tell how much I adore tbo..)
Oh, this is so sweet and precious. I'm such a sucker for Tubbo comforting others and especially karlnapity being comforted. God, they deserve it.