Tweak nipple suckers, another unique design from the Kink by Doc Johnson collection, create powerful natural suction for authentic sensations and engorgement that traditional clips canb t provide. With a simple squeeze, the Tweak set fits perfectly against the skin and creates a strong seal for hands-free funb just attach to each nipple and watch them swell through the visually stimulating sheer black material. Kink by Doc Johnson is an exciting collaboration with Kink.com to create a collection of high-quality authentic fetish items suitable for long-term practitioners and new initiates alike.