Nipple clamps are sex toys that are designed to clamp onto the nipples, providing a sensation of pleasure and pain. To use nipple clamps in bed, you can try attaching the clamps to your partner's nipples and adjusting the tightness to your desired level. Nipple clamps can create a sharp, intense sensation that can be very pleasurable for some people. However, they can also be painful if used improperly or if the clamps are left on for too long. It is important to communicate with your partner and establish clear boundaries and limits before using nipple clamps, and to make sure that the clamps are secure and comfortable. You should also have a safe word that you can use to stop the activity if necessary.