Because that's how it is. Not everyone in the world who can communicate the way we are doing right now is human... Or your own kind.

[Whatever Ginger is.]

Beasts communicate as well. It just so happens that I am as literate as any other body in this manor. To continue saying that I'm no beast, despite me telling you that I am, is to say that you know me better than I know myself. [Then he tilts his head over their joined hands.]

Rude, is it not?