The ridges to charm the G-spot. Charmer is a dildo designed to hit the G-spot over and over as it's worked in and out. Many people do not know how to find the G-spot. Most G-spot toys on the market are 6" in length, which has led people to think they are supposed to put the toy in all the way, and they end up missing the mark. The urethral sponge is located 1" to 3" inside the vaginal opening, so the Charmer's many ridges are a guaranteed hit!