Your new main squeeze is here! Main Squeeze penis stimulator sleeves are styled with an ultra-realistic vulva opening made of Doc JohnsonÕs soft, realistic, and hypoallergenic ULTRASKYNª material. Encased in a sleek, black hard shell, these hard case masturbators feature a squeezable grip that lets the user control the degree of tightness during use. Each squeeze brings additional pressure on the exquisitely textured internal canal that grinds along the shaft--and comes pretty darn close to simulating the pleasures of intercourse! Try soaking the removable sleeve in warm water, then slicking it with water-based lubricant, for a more life-like sensation. Slide a vibrating bullet into the hole at the base and send shivers of vibration throughout the entire tunnel! Plus you can remove the end cap to control the amount of suction you can feel during Main Squeeze penetration--with a noticeable difference in pressure when the cap is on versus off, youÕll want to experiment all night long. Main Squeeze sleeves can also function as stamina training tools; by slowing the intensity of strokes, you can learn to last longer, if you wish.