Ever wanted to see what really happens behind the curtains? Doc Johnson's Main Squeeze Optix lets your voyeuristic side run wild with the first fully transparent masturbator. Its crystal-clear case and sleeve give you a front-row seat to witness yourself in throes of passion. Squeeze the malleable casing to your desired tightness and watch Optix work its magic, as its snug, textured interior creates suction and sensations so intense you'll be begging for an encore. An adjustable end cap lets you control the vacuum for customized bliss. Discreet yet erotic, Optix's sleek hard case keeps your new naughty pleasure perfectly pristine for your eyes only. What mysteries will you uncover when you peek into the looking glass of your desires? Optix lays it all bare for your viewing pleasure.