Study in Chinese Medical Journal, 2009, Vol. 122 No. 24:3017-3019 describing the dorsal penil nerve and how it affects premature ejaculation. The penis has highly variable innervation with between 1 and 7 branches of the dorsal penile nerve, In some cases branches continue the way round to the ventral aspect. The nerve topology could possibly explain the highly variable subjective outcome for circumcision. The study states, "the anatomic distribution of penile dorsal neural variation may account for the disadvantages of circumcision."