I like to organize ships that I like by name order, especially because I like one-sided relationships. In a LeftRight name like SpongeSquid, Left denotes giver of affection, and right denotes receiver of affection.
I don't always have fixed relationship types for cartoons. It's usually for pairings that I really like or relate to.
Many of these examples fall under the younger x older or student x teacher tropes.
Because I like it. Sometimes you want to be the fister and not the fistee.
If you don't do steiner_math when organizing relationships, that's cool! Heck, we can even have different ship orders. Please just respect my preferred relationship types :)