...And often contain more plastic. But you're right, Crosseyed: As far as we should be concerned, real celebrities are nothing more than fictional characters. While comparing, say, Jessica Alba to Samus works, comparing either of them to a human-proportioned wombat with boobs doesn't.
Technically speaking, the term "Furry" doesn't strictly refer to a sexual deviation. It's more of a [weird] lifestyle in which, much like in homosexual culture, the sexual aspect is more pronounced. The proper term for furry sexuality is "Yiff", which supposedly originates from the sounds foxes apparently make while mating.
Apparently.