I think you are misreading the link. The guy suggesting to rub one out before the main session was the guy looking for advice not suggesting it.Razon said:Jerk off twice!!!! but then you might get blisters
The advise is to learn to exercise your pubococcygeal muscle (PC Muscle) in order to control the ejaculation reflexes. Also, if you sensitive to her body heat once you enter her then you have to learn to overcome it. Either just do nothing for a few moments after penetration or do more foreplay beforehand. The goal is to "warm up" and become less sensitized before the pumping starts.
Double condoms can work also for desensitization.
Don't use porn stars as role model. Most of the time they are rock hard before the pants come off which means assistance is involved (viagra or injections)
http://www.tangomag.com/20086446/the-hard-life-of-the-male-porn-star.html
Give this a read as well
http://www.scribd.com/doc/210122/Sex-Secrets-How-to-Make-Love-All-Night-Dr-Barbara-Keesling