To modern eyes, it may look like a piece of titillating filth. As his coiling tentacles slither over her blemish-free body, caressing a nipple and encircling her nubile legs, this unlikely molluscoid lover pleasures his prostrate captive, who throws back her head in ecstasy while a second, smaller octopus plants a tender kiss upon her mouth. It is one of the most salacious images in the history of art: deep underwater, a gigantic pink octopus drags a naked young woman into a cleft between two rocks.