He does vocalize some stuff, they're different, I can already know if he's asking for me or someone else, there's also other kinds of stuff like "Follow me", after he asks me to get close, he vocalizes the same thing, but well, after all, we could be saying "Fucking bitch, get away!", who knows. Cats aren't supposed to do any noise, they communicate by smell and other kinds of language, they just vocalize stuff because of humans.