Hello all:
As time goes on, the focal point of rising ecstatic conductivity in the area of the perineum shifts from sexual (the front) toward the anus and rectum (the back). In a very general (and unofficial) way, the perineum represents the distance between root (anus) and second chakra (sexual organs). The perineum is a logical end point in spinal breathing, covering the full scope from genitals to anus.
Kundalini means "coiled serpent," and the scriptural description is specific -- three-and-a-half coils around the root lingam. This corresponds with the neuro-biology in and around the rectum.
As ecstatic conductivity comes to bloom in the nervous system, this spiritual anatomy reveals itself by degrees. Until then, we are taking things a bit on faith when we do our spinal breathing to the perineum. We know something is going on there, but we don't know exactly what until the inner energies are awakened. In the meantime, we want to be careful not to wander too far off in our practice with this or that sensation, or we may end up missing the main event.
Of course, once we have ecstatic conductivity going (an awakened kundalini), we will not be leading her so much anymore. She will be leading us. We just don't want to be jumping the gun on her, running off into myriad sensations, emotions and thoughts with our practices. What I am saying here applies in all the AYP practices. So much can be coming up that can attract our attention. This is why the lessons say so often: When experiences happen in our practice, whatever they may be, we easily come back to the procedure of the practice we are doing.
So, Jim is wise to advise you not to be running too far up the perineum there in your spinal breathing. The real action will be happening in the other direction... But dont go charging off there in spinal breathing either. Just stick with the practice as given is my suggestion -- to the perineum. Dont forget you will have mulabandha/asvini and siddhasana in there too, along with all the other practices influencing the spinal nerve as well. So it will all work out in the end. Was that a pun?
Ah, adventures in yoga!
The guru is in you.