Let's face it, once you cut into a pie it's just a mess. It's much easier to maintain the aesthetics of a pie if each person has their own.
When I was a wee tot I had a Woodstock Christmas tree ornament. My brother had Snoopy and my sister had... the girl Snoopy. What was her name? Oh that's right, Belle! Thanks Google! Anyway, I always knew that despite species, Woodstock was always top dog. This cake proves it.