The male genital-urinary system has an essential function of ejaculation of semen.
This article also talks about herbal supplements that support the above conditions.
As a result, blood vessels in the Penis get dilated and hence the blood flow through it gets increased thus helping one maintain the erection.
As soon as a person gets aroused sexually, his heart rate increases and blood is pumped to the penis and fills it.
It can also obtain naturally.L-Arginine rich foods include dairy products, meat fish and nuts.
Sexual stimulation causes the brain to activate the release of Nitric Oxide from L-Arginine in the penis and clitoris.