The Wartenberg Pinwheel was originally designed by Dr Robert Wartenberg to test nerve reactions as it glided across the skin.
The pinwheel is a versatile toy that can be used in a variety of ways, use it lightly to tickle and stimulate or add more pressure to make your lover squirm. Dragged across the skin, as opposed to rolled across the skin the Wartenberg wheel feels like claws. Used with normal pressure the pinwheel can be very lightly run across the skin for a stimulating tickling sensation. Add more pressure and you can achieve the sensation of light pain, which can be varied with the pressure.
Alternatively, use the pinwheel after a spanking to add a thrillingly prickly new range of sensations and stimulation!