The Posh Silicone “O” Balls from California Exotic Novelties are weighted kegel styled exercisers. They are very easy to use, you just slide the balls inside your vagina. There are a few different exercises you can do with them. The most basic exercise is to just squeeze your kegel muscles while the balls are in. For easier insertion, you can apply some lubrication that is safe to use with silicone. The retrieval cord is used for removal when you're finished using them.