Faust dreams while Mephistopheles attends him. In his vision beautiful naked women writhe and cavort in the air around him. Mephistopheles sits over him as if in attendance or concentrating on the vision of Faust. Here are aroused and seducing sexual witches, more than just Faust’s fantasy.
Falero was a Spanish painter who relocated to Paris and London. His work was known and popular. His subject matters were often beautiful, naked and nubile young women, his work sometimes on the edge between art and and prurience. Or is it the viewer?
See https://en.wikipedia.org/wiki/Luis_Ricardo_Falero and for a more extensive and revealing bibliography, https://arthistoryproject.com/artists/luis-ricardo-falero/.