Frottage (from the French for "rubbing") is a surrealist and automatistic method of creative
production developed by [Max Ernst]
? in which one takes, for example, a pencil, and makes a "rubbing"
over a textured surface.
The drawing can be either left as-is or used as the basis for further refinement.
While superficially similar to brass-rubbing, frottage differs in being automatistic
and aleatory
? in nature.
Frottage (or frotteurism) is also the act of obtaining sexual gratification by rubbing
one's clothed body against another.