Here’s another entrant in the whole “what he’s thinking about when he’s wanking” category of erotic art:

From the 1950s French book Leçons d’amour. This artwork is usually attributed to “Jean Guyot” but for all I can make of the publishing info at that link, that name is just as likely to be the pseudonym of the book’s author as of its perhaps-uncredited illustrator.

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