Designed by the scientists at Nippori Gift as a training device to increase your stamina, the Gekishin Penis Trainer is a vibrating cock sleeve that lets you get used to stimulation of your cock, allowing you to last longer between the sheets. Of course, it also works as an electric onahole, with three power levels and nine vibration actions that get even the most jaded user convulsing with pleasure. The internal protrusions add an extra level of stimulation, pleasuring all your member while the powerful motors shake you to your core.
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