The Interpretation of Dreams by Sigmund Freud Chapter 5 Page 4

to unmistakably sexual wish-feelings, which are often of an unexpected nature. For example, who would suspect a sexual wish in the following dream until the interpretation had been worked out? The dreamer relates: Between two stately palaces stands a little house, receding somewhat, whose doors are closed. My wife leads me a little way along the street up to the little house, and pushes in the door, and then I slip quickly and easily into the interior of a courtyard that slants obliquely upwards.

Any one who has had experience in the translating of dreams will, of course, immediately perceive that penetrating into narrow spaces, and opening locked doors, belong to the commonest sexual symbolism, and will easily find in this dream a representation of attempted coition from behind (between the two stately buttocks of the female body).