When, with lotus-feet set well-apart on the ground, she bends, placing a hand upon each thigh, and you take her from the rear, it is Gardabha the Ass. He goes around the room asking for names of bizarre sexual positions and writing them down on the chalkboard, to ensure that the kindergarteners are all paying attention. Another is where an act isn't named, only implied. So what am I thinking? In Terry Pratchett's Pyramids , the sweet-natured and possibly even virginal handmaiden Ptraci manages to embarrass hardened pirates with her theoretical knowledge: If she strides you, facing your feet, brings both her feet up to your thighs, and works her hips frantically, it is known as Hansa-lila Swan Sport. Apparently "the stinkbug" is quite popular.