I definitely see what you mean with the euphemism, but I interpret it differently. I think he feels like a broken person, possibly from a past love. He slithers around, depressed and thinking that he is inherently bad while other people are happy (mice). Then he falls in love with someone and he begins to change. He feels different and that maybe he isnt a snake, and that mind set is just a chemical imbalance like depression.
I definitely see what you mean with the euphemism, but I interpret it differently. I think he feels like a broken person, possibly from a past love. He slithers around, depressed and thinking that he is inherently bad while other people are happy (mice). Then he falls in love with someone and he begins to change. He feels different and that maybe he isnt a snake, and that mind set is just a chemical imbalance like depression.