"with the same reason as Pasiphae doth of her bull"

Minotaur, Yorkshire Sculpture Park
Creative Commons Attribution Share AlikeMinotaur, Yorkshire Sculpture Park - Credit: Malcolm Morris
In Greek mythology, Pasiphaë is the daughter of Helios, the Sun, and Perse, an Oceanid.  She was given in marriage to King Minos of Crete.   

Minos’ brothers challenged his rule.  Minos prayed to Poseidon to send him a snow-white bull, as a sign of support, promising to sacrifice the bull in Poseidon’s honour.  The bull was however so beautiful, that Minos decided to keep it.  To punish him, Poseidon made Pasiphaë fall in love with the Cretan Bull, the bull from the sea.  Pasiphaë had a crafstman build a hollow wooden cow, and climbed inside it in order to mate with the white bull. The offspring grew into the ferocious Minotaur, with an appetite for human flesh.