Small stimulus roller is your best tool, whether it is palm stimulation, soles of the feet, thigh or other sensitive areas, can be handy. Top has a spiny small roller, as long as the handle holding the wheel to move back and forth, dark tie or shallow bar each other‘s skin, for each other with substantial stimulus

 roller (even thorn) 3 cm in diameter, length 18.5 cm, 8 cm long handle, weight 60 grams