The story of Taurus:

The sign of Taurus stems from the Tale of Phoenician Princess Europa and the Bull. This is a tale of one of Zeus' many affairs. Zeus was extremely attracted to Europa and yearned for her affection. Zeus then appeared before Europa in the form of a magnificent white bull. Europa couldn't resist petting the bull, so she walked over to it and did just that. She then climbed upon the bull's back at which point the bull carried Europa across the sea to Crete where he then took the form of an eagle and, for a lack of better terms, raped her. In rememberance of this affair, Zeus placed the image of the bull amongst the stars.