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1.
Analagous to the f stops on a camera,this refers to aperture settings built in to the anus.These f stops vary with the load. An f-1 would be used to pass a tapeworm while an f-11 would be needed for a loggerhead turd. Butthole f stops can get out of sync with excessive anal sex which can and often does result in turd whittling.(passing a turd through too small of orifice)
This one ole gal I knew had a gaping bunghole because her butthole f stops were all messed up.
by wolfbait51 June 06, 2011