Frankly, TedEbear is full of $hit because while his idea might work for a few men (mainly himself), that's not how it works for everyone. The more you cum, the longer it will take you to come next time. The thing is though that some guys may only be able to get it up a certain amount of times a day or that stimulating one's self in such close intervals can leave that individual too desensitized to achieve orgasm the next time.
NOTE: ...I say all this not based on stuff I've heard or read but from experience in relationships. In my current situation, if he stopped masturbating altogether his libido would go way down.
But if you're still weary of my advice, you obviously have the internet at your disposal so look it up on some scholarly source. That way you will get facts and not the malarkey that the gentleman below me is trying to boast.
Well, jacking before actually having sex isn't a bad idea because you will last longer then. However, you have to give yourself a window of anywhere between 10 minutes to a couple hours because you will be somewhat desensitized.
There's a difference between how things work for you and how they work for other people. You CAN train yourself to last longer during masturbation and make the orgasm better by lengthening out duration. And I do know quite a bit, BEING AN ANATOMY STUDENT WITH EMPHASIS ON REPRODUCTION
I have decided to respond to this question as I am the girlfriend. You have essentially trained yourself (penis) to obtain instant gratification. This results in ED or premature ejaculation. You have trained your body to get a fast release and when this doesn't happen you lose your erection because your penis isn't recognizing the longer time it takes to satisfy your girl. Since my boyfriend stopped masturbating and we together have allowed a short time frame to pass he now has the stamina to maintain an erection until we are both satisfied. What an awesome difference this has made.