Work Text:
Tommy doesn't understand why everyone insists soulmates are always romantic.
Every lifetime Tommy has been in, everyone who has a soulmate wants to marry them. And people look at Tommy in horror when he tells them he has no intentions of being in a romantic relationship with his soulmate. They pity him, as if his choice is a tragedy. They ask for a sob story and blanch when there is none. They always tell Tommy he will change his mind.
Tommy hasn't changed his mind, and neither has Tubbo. Both are content with friendship. They always have been and always will be. The two would much rather stick together and have fun together than do things like kiss and start a family. The only pets the two of them have ever kept are bees and neither have ever showed interest in adopting kids whenever that has been an option in their world. Tommy is content with the way things are, and he knows Tubbo is too.
Tommy thinks that's why the two work so well together. Why they are soulmates in the first place. Sure, Tommy enjoys being with his other friends, but Tommy can't guarantee he'll see any of his friends in his next life except for the one who matters to him the most. As long as Tommy had his Tubbo and Tubbo has his Tommy, they'll both be happy throughout all their lifetimes.
Tommy and Tubbo are best friends, and Tommy never wants that to change.