sweat = lube (definitely more oily than spit)
alcohol/otherwise induced state of total relaxation ---> lowers amount of lube necessary

can we agree that pleasurable anal sex without externally-produced lube is possible? it is also possible to argue the semantics of "self-lubing," so i guess if it makes you happy we can do that, too....

by all means, make your point, but it's superfluous. i seriously doubt anyone on this comm thinks that the typical human anus has special KY glands.