Hylas was a prince of the Dryopians and companion to Heracles. Many say that the young man was also Heracles' lover, making the boy a lot like Heracles' other famous eromenos (boy lover) Iolaus. While traveling with the Argonauts to find the Golden Fleece, Hylas ditches Heracles to hang out with a bunch of sexy water nymphs and disappears – permanently.