I’d never heard of Édouard-Henri Avril until tonight. His name came up during my prep for the next Life Of Caesar podcast.
According to Wikipedia, Avril (21 May 1849 – 28 July 1928) was a French painter and commercial artist. Under the pseudonym Paul Avril, he was an illustrator of erotic literature. His major work was designs for De Figuris Veneris: A Manual of Classical Erotica, an anthology of ancient Greek and ancient Roman writings on erotic topics, discussed objectively and classified and grouped by subject matter, by the German scholar Friedrich Karl Forberg.
Here is a collection of 46 of his paintings. They are quite saucy.