Erect p***s Pulsing

Answer 1

Any artery in the body [since birth]will pulsate but only some arteries that are against a hard region will have visible pulsation.


When your p***s is hard [erect], the arterial pulsation is visible.
It Is Normal & you dont need to be worried about that.
More Info At http://www.articlesbase.com/mens-health-articles/maintaining-a-healthy-p***s-2174121.html

Answer 2

the pulsing you are expiriancing is called " throbing" and it is part of the drive to ejaculate that caused your erection in the first place. you may find the rate at which it "thobs" is the same as the rate the ejaculative spasms in your p***s when you ejaculate. in premature ejaculators the natural throb is mistaken for the ejaculation sensation and s***n flow is the result.