Hieronymus Bosch (Jeroen van Aken, ca 1450-1516), The Garden of Earthly Delights, triptych (ca 1500), central panel detail 4.
(Source: en.wikipedia.org)

In the centre behind the pool, an enormous blue globe rises out of a lake, with at either side huge rosy-blue pavilions of pleasure. Inside an opening on the globe just above the water level, a man touches a woman’s private parts with her consent, while nearby a loving pair is swimming in front of them.