From - The Perfumed Garden of Sensual Delight
TWENTY-FIRST MANNER--Rekeud el aïr (the race of the member). The man, on his back, supports himself with a cushion under his shoulders, but his posterior must retain contact with the bed. Thus placed, he draws up his thighs until his knees are on a level with his face; then the woman sits down, impaling herself on his member; she must not lie down, but keep seated as if on horseback, the saddle being represented by the knees and the stomach of the man. In that position she can, by the play of her knees, work up and down and down and up. She can also place her knees on the bed, in which case the man accentuates the movement by plying his thighs, whilst she holds with her left hand on to his right shoulder.
HER
HIM