After inserting your penis, the pressure pads can be used to manually control the pressure. Or, you can squeeze out the internal air to create a strong vacuum suction. The repeating edges on the inside give a hugging sensation on both sides of the shaft. The pressure pads on the side of the toy are soft to the touch and allow for greater stimulation because of the suction it creates. The Electronic Vibration Masturbation Sleeve is also a great way to build stamina.