Druce Millis wouldn't have bothered at all had he known that Planet X was really a heavily defended lump of rock, rather than a planet made entirely of porn as the name implies.
No matter how hard Quincey tried, he was never recognized as a planet, or a female. So one day while the planets were going about their daily business Quincey snapped and no matter how hard the snails tried, kept growing he then went on to destroy every planet he could, and that was how the cow jumped over the moon.