Bull worship was a mainstay of Minoan culture and the children were sent into the bull ring as dancers with the bull.
From this the whole legend of the Minotaur arises.
He actually volunteered to go with the youths to Crete where he met Ariadne, got her help and killed the Minotaur who was the offspring of Minos wife Pasiphae and a Bull.
When Theseus returned to Athens he forgot to change the black sail to white and his Father, seeing the black sail thought Theseus was dead and leaped from the cliff into the sea which became known as the Aegean from then on.
On the way home, Theseus abandoned Ariadne on the island of Naxos. She was found by the God Dionysus who married her. She was good enough for a God but not good enough for Theseus apparently.