As-you-want-it customisation of stimulus and precision compression is the TENGA Flip Hole's USP. Variform internal textures keep each thrust unpredictable while 3 buttons on each side allow you to up the internal pressure at the most pleasuring points. Partially flexible casing with 3 buttons on each side allows you to play your male masturbator like an aqua arcade game. Press away to explore the effects along the shaft - massaging the head, sucking the base - the choice is yours. With no need to have an erection before play, this toy is perfect for anyone with Erectile Dysfunction, as you can flip the case open to insert your manhood without thrusting inside. Always use a good quality water-based lube with this toy for maximum pleasure. Please note: The TENGA Flip Hole has a small air bubble next to the first button on the unit. This is to help with the expansion of the rubber and will not rupture or pop during use.