Questions about example sentences with, and the definition and usage of "Vagitarius"

A: “I’m a vagitarius” is a Family Guy joke. People usually say, I’m a Leo, so I am usually mean! The line from family guy was:
What can I say? I’m a vagitarius! It’s a joke about how people use their astrology sign as an excuse for their bad personalities. In Quagmire’s case, he mixed the words vagina and Sagittarius as a joke since he loves anything sexual.