I am me. You are not me. You are you. If I was you, I wouldn't be me.
If you were me, I'd be sad.But I wouldn't then be me because you'd be me so you wouldn't be me because I wasn't me because you were me but you couldn't be because I'd be a different me. I'd rather be any kind of bird (apart from a goose) than be you because to be you I'd have to not be me which I couldn't do unless someone else was me but then they would be you aswell so there would still be no me. They would be you because I was you so to restore balance you would have to be me and them meaning all three of us would become one continously the same. That would be very bad.