This breaks the Vaginal Canal into sections. Keep in mind: the whole vaginal canal is a muscle. When you do the Yoni Crystal Practice you want to begin by strengthening each section independently.
First Section: is the vaginal opening including the front of the vaginal canal. Using 10% of your strength slowly squeeze this section closed and inwards. This is a kegel.
Second Section: this is smack dab in the middle of the vaginal canal but most importantly this is the area where your vaginal canal is located. To fully orgasm or to experience orgasm you must awaken your g-spot. By strengthening and bringing your breath to the middle section of your vaginal canal, you begin to create sensation here. Using 15% of your strength slowly squeeze this section together and inwards. It is like touching one wall to the other than slowly release. This is a kegel for this section.
Third Section: this is the bottom of the vaginal canal which includes the opening of the cervix. Usually the first and third are easy to master. Using 10% of your strength slowly squeeze this section together, closed, and inwards. It will feel like touching one wall to the other and closing the opening of your cervix. This is a kegel for this section.
I offer more detailed instructions in my Yoni Guru Workshops in person and via video chat.