Sunday Dalí: Scatological Object Intended to Function Symbolically, 1932.

Dalí described this work in his own words:

A woman’s shoe, in which a glass of lukewarm milk has been placed, in the middle of a ductile plastic that is excremental in color.

The mechanism dips the sugar cube painted with the image of a shoe, so as to observe the disintegration of the sugar cube and, as a consequence, the image of the shoe in the milk. Several accessories (pubic hairs stuck to a sugar cube, small erotic photo) complete the object which is accompanied by a spare box of sugar and a special spoon for stirring the grains of lead inside the shoe.

Dalí, Salvador. Oui: The Paranoid-Critical Revolution. in Dawn Ades's "Surrealism: Fetishism's Job." in Anthony Sheldon, ed. Fetishism: Visualizing Power and Desire. London: The South Bank Centre. 1995.