Venus Rising from the Sea - A Deception (1822) - Raphaelle Peale
I used to think 19th century fine art painting was all fluff and moonlight, but this is one of my favorite examples to the contrary. Rich men would comission artists for naked lady paintings, then hang their prize behind a curtain so as not to offend actual ladies who visited their homes. The curtain would come down, however, when the menfolk came over. For intellectual discussion. Of the human condition.
Here we see Peale most likely mocking the hypocrisy and prudishness of this elevation of what was basically rich people porn to the status of art and then hiding the depiction of the body from the very types of people with the bodies that it claimed to portray.
This is also an unusual painting for Peale himself, who produced mostly still lives of rotten meat and vegetables.