Puppets are used to  soften the suggestiveness of the song, penned by Kenny Beard, Casey Beathard, and Rivers Rutherford.  The title, in case you were curious, is an expression used to symbolize something scandalous and is based on a bass guitar riff made popular in 70s porn.  Hence, puppet cows, pigs, chickens and even a puppet Trace come into play.  It truly is one of the more entertaining videos out there.  Check it out.