Ganymedes was the son of Tros, the founder of Troy, or Laomedon, the father of Priam, king of Troy during the war with the Greeks, according to the myth.
He was a man of extraordinary beauty to whom Zeus, who not only noticed female beauty, seduced him by the appearance of an eagle. Zeus made love with the boy and guaranteed him immortality and eternal youth, as well as granting him the constellations of Aquarius and Aquila, the eagle. Ganymede became one of Zeus lovers.
This myth is considered one of the origins for homosexuality and sodomy. Also it is an example of greek life and culture at that time.