Foot fetish fans will get a kick out of Greta Carlson's visit to Anthony Lawton's dungeon. He tapes her legs, whips her feet, then applies hot wax to them. Greta screams most delightfully, especially when her master brushes her feet with a feather that has a wooden-spike on one end!   Unfortunately, the action goes on and on for no apparent reason. Come on, Anthony, what did Greta do to deserve this?