Instructionals Kit- Sensual BDSM For CouplesExplore your boundaries with this erotic kit that introduces you and your partner to the BDSM experience. Bring a naughty edge to your sex life by discovering techniques and tools for light bondage, sensory deprivation and more! The first in the kit are some Black Duo Balls to slip inside the vagina for erotic stimulation during spanking and other BDSM acts. Strengthens vaginal muscles for more powerful orgasms with a turdy handle for easy retrieval.