Poseidon was said to have had many lovers of both sexes (see expandable list below). His consort was Amphitrite, a nymph and ancient sea-goddess, daughter of Nereus and Doris.
Poseidon was the father of many heroes. He is thought to have fathered the famed Theseus.
A mortal woman named Tyro was married to Cretheus (with whom she had one son, Aeson) but loved Enipeus, a river god. She pursued Enipeus, who refused her advances. One day, Poseidon, filled with lust for Tyro, disguised himself as Enipeus, and from their union were born the heroes Pelias and Neleus, twin boys. Poseidon also had an affair with Alope, his granddaughter through Cercyon, his son and King of Eleusis, begetting the Attic hero Hippothoon. Cercyon had his daughter buried alive but Poseidon turned her into the spring, Alope, near Eleusis.