Inadvertently touching the glans or rubbing the glans, you will generally feel a tingling sensation in the legs, due to the presence of common sensory nerve endings. It is actually a normal physiological phenomenon. For example, for most teenagers, especially the circumcision of the teenagers, in the bath time to release the foreskin, the use of water rinse as well as touching the glans, there will be a kind of numbness stimulation, sensitive reaction, this is a normal phenomenon. Another thing to note is that usually try not to overstimulate the glans, such as excessive masturbation and so on.