비아그라에 대한 소문이 있는 버즈

Sexual stimulation that causes an erection results in the output and launch of nitric oxide from the penis. Nitric oxide brings about an enzyme, guanylate cyclase, to make cyclic guanosine monophosphate (cGMP) that is definitely principally to blame for escalating and decreasing the scale of blood vessels carrying blood to and within the penis and