So, if your theory is correct, you’ll reach your goal height just in time to fill your casket.
As for the rings on the neck…. try taking those rings off. The outcome is not pretty. There are actually spaces between the bones in the neck. To take off the rings would mean that those women could not hold their own head up, for their neck muscles have atrophied so much during the stretching process. In fact, I think when a woman from that particular tribe breaks the law, her punishment is to remove the rings so she must walk around the village with her head hung in shame!
I don’t mean to live up to my username on this one, but “growing” in height is just not possible. Perhaps with the correct regimen of dangerous hormones, you might be able to grow a little bit, but as for the side effects, I’m unsure.
And you still didn’t answer my other question… if you think you’re dick still looks small, why would you want to be taller?