If you harbor fantasies about being used and abused by a randy temptress for her own pleasure, then this hits the bullseye without the need to spend money on handcuffs.
You lie on your back with your knees drawn up, as though preparing to do that odd "bicycling in the air" routine PE teachers used to be so keen on.
She squats down on your penis and lifts herself up and down to provide the action.
She can set the pace and, as she's not looking at you, can indulge in any "faceless" fantasies she chooses.
Illustrations by: Jethro Quizon