Did you know that Albert Einstein was married twice? He married his cousin, Elsa Lowenthal (nee Einstein) after his first marriage failed in 1919. He had had a relationship with her since 1912, and had lived apart from his first wife for five years.
At the time he stated that he was attracted to Elsa "because she was so well endowed." Shortly after his wedding with Elsa, he postulated that if you are attracted to women with large breasts, the attraction is even stronger if there is a genetic connection.
This concept became known in the town where he
lived as Einstein's theory of relative titty.