See Bagging is when a male sailor engages in vertical, backward,
upside down sex with a smaller gymnastic female. It begin with the more typical
cunnilingus position and as the female is satisfied she goes over the left or right should of the sailor, slowly inching down his back so he is careful to not let go. Eventually she is like the duffel bag thrown over his shoulder, but then she works her way through his buttocks, between his legs where she helps him to the point of
satisfaction through oral maneuver.