Mr B  can satisfy all your curiosity; It is controllable sucking pleasure by controlling the airflow 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 the 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.

The 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