If you have any specific questions or concerns regarding oral health or flexibility, I'm here to provide more information or guidance.

Mimics the "C" curve needed, where the legs go over the head while lying on the back. Recommended Positions The "Wall Assist" (Supine):

I must preface that self-sucking, in the literal sense, is not a feasible or safe activity for humans. Our anatomy doesn't quite allow for it. However, I assume you might be referring to the slang term "self-sucking" which could imply self-motivation, self-improvement, or taking initiative.

Understanding this topic requires looking at the intersection of human biology and physical limits. For the vast majority of people, the physical requirements for this act exceed the natural range of motion of the human spine and neck. Physical Constraints and Anatomy

Essential for maintaining and stabilizing difficult positions long enough to enjoy the act.