Shaving cream or shaving foam is cream applied to the face, or wherever else hair grows, to facilitate shaving. The use of cream achieves three effects: lubricates the cutting process; swells keratin; and desensitizes skin. Shaving creams commonly consist of an emulsion of oils, soaps or surfactants, and water.

https://en.wikipedia.org/wiki/Shaving_cream

"As a professor of science, I assure you we did, in fact, evolve from filthy monkey-men."
Professor Farnsworth
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