i think the reason i find charlie x todd so interesting is bc it would be the type of relationship where the roles get reversed. todd is this sweet, gentle person and charlie is an arrogant son of a bitch, but with each other todd turns charlie into a total melt while charlie brings out todds dominant side and they both LOVE it. they love the effect they have on one other.
charlie loves the way that todd comes out of his shell and takes charge as soon as they get alone and how nobody else gets to see todd like that, its just for him. todd loves the way he can have charlie completely at his mercy and how nobody else has ever had that effect on him.