Penis clamping refers to a practice in which an individual uses a device or technique to apply pressure to the base of the penis in order to achieve a sustained erection or delay ejaculation during sexual activity. This technique can involve using a variety of devices, such as cock rings or clamps, or manual techniques that involve using one's hands to apply pressure to the base of the penis.
It's important to note that penis clamping can be potentially dangerous if not done correctly, as excessive pressure or prolonged use of devices can cause tissue damage, pain, or even erectile dysfunction.