L.H.O.O.Q. and wrote "Moustache par Picabia / barbiche par Marcel Duchamp / avril 1942". As was the case with a number of his readymades, Duchamp made multiple versions of "L.H.O.O.Q." of differing sizes and in different media throughout his career, one of which, an unmodified black and white reproduction of the "Mona Lisa" mounted on card, is called "L.H.O.O.Q. Shaved". The masculinized female introduces the theme of gender reversal, which was popular with Duchamp, who adopted his own female pseudonym, Rrose Sélavy, pronounced "Eros, c'est la vie" ("Eros, that's life"). Primary responses to "L.H.O.O.Q." interpreted its meaning as being an attack
Marcel Duchamp circle. When the apparatus spins, an optical illusion occurs, where the segments appear to be closed concentric circles. Man Ray set up equipment to photograph the initial experiment, but when they turned the machine for the second time, a belt broke, and caught a piece of the glass, which after glancing off Man Ray's head, shattered into bits. After moving back to Paris in 1923, at André Breton's urging, with financing by Jacques Doucet, Duchamp built another optical device based on the first one, "Rotative Demisphère, optique de précision" (Rotary Demisphere, Precision Optics). This time the optical element was a