あ penis pump is a vacuum device. Physically, the penis hardens and remains hard, culminating in penetrative sex. It is also known as a cock pump, a dick pump, a vacuum erection device (VED) or a penis enlargement pump. The device usually consists of three parts: a penis tube, a seal at the base of the penis, and an electric or manual vacuum pump. Because it is a sex toy that touches the dick directly. Therefore, its materials are all high-end high-quality materials. Insert the dick into the vacuum bottle while using the device. Then you get into the masturbation position. Then put pressure on the penis pump. Under pressure, blood flow to the penis is accelerated. Then, the penis begins to erect. If you have erectile dysfunction, then you may need a penis pump.