The M for Men Soft & Wet cup is loaded with fun! Inside are stimulating ridges in the first part, and nubs deeper down the tunnel. This pocket stroker is Self-Lubricating. Add a little water or saliva and everything gets slippery. Just like the real thing! Squeeze the cup and open or close the air valve for more suction and pleasure. M for Men masturbators are soft, flexible, and filled with sensational textures. Self lubricating properties are temporary. It will last up to 12 uses. To clean, wash with soap and water. Pat dry and allow to air dry before storing. Use product only with water based lubricants. It is recommended to start using water based lubricants after self lubricating properties begin to diminish. The Self Lubricating technology is built into the actual material. The component is proprietary and is body safe. The user adds water and this will activate the self lubrication. The self lubrication feature lasts about 10 times, (more or less) depending on how vigorous the user is with the toy. After that, the self lubrication will wear off and they can use their own water based BOO lube.