My father compounded with my mother under the dragon’s tail; and my nativity was under Ursa Major; so that it follows, I am rough and lecherous. Tut, I should have been that I am, had the maidenliest star in the firmament twinkled on my bastardizing.
– William Shakespeare
King Lear, Act 1, Scene 2. Edmund says that his father Gloucester had sex with his mother under the constellation of Draco and he was born under Ursa Major. So it naturally follows that he has a rough and lecherous nature. But he absolutely believes that would have been the villain he is, had the most virginal star in the sky twinkled over his birth.