The definition of Circle Jerk - COULD - be subject to regional differences. Like Pop in the Midwest is Soda everywhere else (each taking their small part of Soda Pop).
In the Midwest, in the 70's (when I was in Jr. High), the accepted meaning of Circle Jerk referred to a wank
ing party game with the last to go eating the unfortunate cracker the produce was aimed at. I take some stock in this definition as there is nothing quicker on the trigger than a Jr. High boy.
Plus they're still of an age where remedial body functions are an item of infinite fascination (do they ever REALLY outgrow that?), and what else would they do on long, dull, Winter nights?
These hors dourves look like circle jerk leftovers.