Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune just doesn't have the same ring as Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto, especially if you grew up in Mexico as a kid listening to this:
I think I, in all of my infinite wisdom and grace can quite accurately conclude that midgets are indeed not people but a stain on the face of civilisation that needs to be wiped out and all memory of them forgotten forever.