Luis Ricardo Falero, Duke of Labranzano, was a Spanish painter with a taste for female nudes in mythological and fantasy settings. This 1878 piece is called Witches on the Sabbath.

Notice the juxtaposition of the human figures with the non-human. The non-human seem even more carnal than the human in twisted ways. Between that and the floating, it's a pretty good bet that this depicts a psychedelic trip. It was understood that a lot of the imagery reported by witches may have occurred under the influence. Does that make it any less valid? Well, that's a question for another time.

Pay attention to the lady in the lower left corner. The expression on her face indicates something is going on, and it's a bit beyond a night out with friends. My guess is that it has something to do with the man whose arm she is hanging onto. I don't think it's an accident that his face is mostly averted. I think this is detailing an affair.