The Toy's One Masturbator Cup features a unique inner design the makers call Triple Protuberance. Housed in a handy hard shell that is easy to hold and pump hard, the inner sleeve is a tangle of stimulating details, from pleat-like zigzagging grooves to large bumps. Everything works to provide intense stimulation on your penis from all sides during penetration, plus generously rubbing the tip of your cock with each thrust.
When lubricant is added to the mix, it conjures up superb sensations inside that outdo even the tightest of vaginas. Cover the air hole on the base to heighten the vacuum, thanks to the row of triple bumps lining the bottom.
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