The Kinsey Scale from 1948 is the outdated way of describing the variance of individuals’ sexual orientation. It uses a scale from 0, meaning strictly heterosexual, to 6, meaning strictly homosexual. Even though it is a busted tool, I can use it to make a more complicated and useless diagram of how Tammy and Mandy works.
__________________________________________
0: Exclusively Tammy

__________________________________________
1: Predominantly Tammy; Only incidentally Mandy
__________________________________________
2: Predominantly (internally) Tammy;
But more than incidentally (externally) Mandy:
Misty

__________________________________________
3: Equally Tammy and Mandy: The Rare Berdache

__________________________________________
4: Predominantly (internally) Mandy;
But more than incidentally (externally) Tammy:
Courtney

___________________________________________
5: Predominantly Mandy; Only incidentally Tammy

___________________________________________
6: Exclusively Mandy
___________________________________________