Always inspect your male masturbator, inside (stick your finger in it) and out, prior to use. Use a generous amount of high-quality water-based lubricant inside, as well as on the face of the masturbator. Work your penis in slowly, to insure good lubrication all around. Once you are satisfied with the feel of the device, enjoy it until you cum. If at any point you feel like the device is sticking, or feel any other discomfort, carefully remove your penis and apply more lube. If the discomfort continues, stop using your device immediately.