The sebaceous secretion is intended to lubricate the skin and hairs.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
When bran or chaff causes the trouble it is best to give a small quantity of oil to lubricate the walls of the gullet, and then by gentle and persevering pressure, to endeavor to separate and divide the mass and to work it downward toward the stomach.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
This was a liquid that even George knew was hardly designed to lubricate the way to a quick agreement.
"Chain of Command"
Stephen Arr