Sexual Themes in Duchamp Paintings

Nude Descending a Staircase No. 2 (1912)

The Bride Striped Bare by Her Bachelors, Even or The Large Glass (1915-1923)

To be looked at (from the Other Side of the Glass) with One eye, Close to, for, Almost an Hour (1918)

Given: 1.The Waterfall 2.The Illuminating Gas (1946-1966)

Common Elements
Glass - The Large Glass, To Be Looked at
Witness, Eye, Mandala, or Voyeur - To be Looked at, The Large Glass, Given
Boundary between Male and Female - To be Looked at, The Large Glass, Given
Bare Female - Nude, The Large Glass, Given
Overtly Sexual Title - Nude, The Large Glass, To be Looked at


To be Looked At, The Large Glass, and Given  are all symbolic of the same thing.
They all have a man and a women, a boundary between them, and each sex is stuck on either side of the boundary.  The man has some way of seeing the female, but she cannot see him.  Instead she teases him with her sexual nature.