sim

They are like an emulsion of two substances that do not mix together, but they can melt in one another while still not having dna stirring together. I think I'm picturing something like liquid mercury that can be divided into smaller portions and reunited.

They can immerse themselves in and emerge out of the other's body. When they're conjoined they can also disproportionate themselves. Tyler is the one more comfortable with disproportion, and he's also the one that resides into narrator almost everytime. Narrator, on the other hand, still doesn't feel like letting Tyler be the one moving both of them.

I thought about Tyler developing as an extension to narrator later in his life (not an alter anymore, he considers him a parasite at first).