This picture...
Olga Romanova. Funny thing, I'm writing a non-consensual story involving her, but that particular fantasy was consensual and one-on-one; I was a noble officer and her lover; she took me on that small table and she was pressed against me, with her legs wrapped around my loins the whole time the intercourse lasted.
It needs to be said that my wife looked a lot like this when I first met her, back when she was in her twenties.