See also these previous:

DOGS MEETING  (DT, with tune; evidently from John Roberts and Tony Barrand, but no other information given).

Song re dogs sniffing rear ends  Includes Australian text, set to The Lincolnshire Poacher, and fragmentary text of unspecified origin to The Church's One Foundation.

Great Australian Folk Song  All sorts of stuff, including more from Australia.

There are probably more, but searches for asshole or arsehole just take too long nowadays.