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"Skin" from Collected Stories (read 1/9/19)
A man meets a young artist and commissions the artist to paint his wife's portrait. One night the three get drunk together, and the husband has the artist tattoo a large portrait of the wife on his back. Years later, the man has lost touch with the artist, but sees his name in a gallery window. The man is old and poor and dirty and almost gets thrown out of the gallery because of how he looks, before he takes off his shirt and shows everyone his tattoo. They recognize it as the artist's work, and a bidding war starts - they want his skin! Finally, he chooses a man who wants live art at his resort - the resort owner wants the man to live at his resort and be pampered, as long as he walks around with his shirt off so all the guests can see the artwork. Later the skin is shown framed and hung.
"Skin" from Tales of the Unexpected (viewed 1/9/19)
The film followed the story well, except it seems like the artist and the wife he painted had an affair. In the story, the artist lusted after the wife, but I don't think she reciprocated.