My particular friend B send me this amusing photograph of two ladies and a young (he looks younger than the usual sturdy middle aged men you tend to get in these sorts of pictures) gentleman in a nicely composed pile. This is probably from a French erotic postcard, although latterly it has been used as the cover of a book on German erotica. Dating these pictures is always problematic and without a very good knowledge of nineteenth century continental millinery it is quite tricky.
The shorter stockings, lingerie, hair styles and less crisp photography would tend to suggest the 1880s or 1890s. I like the fact that the two ladies are smiling in this one. One girl happily frigs the man and herself while the other appears to demonstrate pinpoint accuracy in giving him a salty drink. Of course cameras at the time couldn't capture a lady in mid flow like this so a little post photographic manipulation would have been needed!