Thing One and Thing Two also seem to subscribe to these principles.
If I like it, it's mine.
If it's in my mouth, it's mine.
If I can take it from you, it's mine.
If I had it a little while ago, it's mine.
If it's mine, it must never appear to be yours in any way.
If I'm chewing something up, all the pieces are mine.
If it just looks like mine, it's mine.
If I saw it first, it's mine.
If you are playing with something and you put it down, it automatically becomes mine.
If it's broken, it's yours.