Mr. B  is  can satisfy all your curiosity, It is controllable sucking pleasure by controlling the air flow through the stoma, air pressure is formed in the cup body tightly enveloping the root, just like the pleasure of mouth suction.

Self control is more authentic when used, it can achieve different sucking effects by cooperating with stomatal press and can be experienced by gently pumping into the depth.

Not Blocked: The cup has good air circulation strong wrapping feeling
Half Blockage: The air in the cup is blocked to produce a sucking contraction clamp force
Fully Blocked: Strong sucking and contracting force of airflow inside the cup

Q Elastic full inner bladder, every inch of skin can feel the real sense of flesh

Soft and skin friendly inner bladder, can be used repeatedly

• Triple Negative pressure masturbation
• Manual Penis Masturbation
• Material: Silicone
• Type Control: Manual
• Weight: 292 g
• Sizes: 162mm x 67 mm , 135mm x 61mm
• Waterproof