This is a very special masturbator for men. Packaged in the shape of an egg - it can be stored in the refrigerator. If you are horny you take it out chilled - put some lubricant in the opening and put it over the glans of your hard cock. Then you can - like a foreskin - move back and forth. Mine has a few light knobs inside and massages my penis Super GEIL - until the sperm squirts into the egg shell.