The simplest way to super-charge your sex life, these 2 small spiky balls help tone your pelvic floor muscles, which can lead to more intensified orgasms for the wearer. Inside are free-roaming weights that roll arousingly with your every move. Securely connected by a string that ends in a loop for easy retrieval, the pair of balls are safe to use out and about, during daily chores, or even running for the bus. Jiggling intensity depends on the level of activity undertaken. You can use these balls as a beginner workout to build up to weightier models, or simply enjoy the amazing short and long term effects these balls bring. Coat both balls with a healthy helping of water-based lubricant before slipping inside one at a time.