FROTTAGE OR COCKRUBBING OR "HYACINTH LOVE"

More frottage pics here.
About Apollo and Hyacinth here.

Greek depiction of lovers Zephyros (the west wind) and Hyacinthos engaging in frot. Attic red-figure vase (kylix) signed by Douris, 490 - 480 b.C. Museum of Fine Arts, Boston, Massachusetts, USA