Masturbation can't cause ED, but porn use can.
If you are under 40, and not on specific medications and don't have a serious medical condition, the causes of your copulatory ED are almost certainly anxiety or porn—or a combination of the two. Here's a simple comparison test to check for porn-induced ED:
1. Masturbate to your favorite porn.
2. Try to masturbate using no porn and no fantasy - only sensations. Masturbate with same speed and pressure as you would during intercourse.
Compare one and two. How erect was your penis? How long did it take you to reach orgasm? What was your level of excitement? A healthy young man should have no trouble attaining a full erection and masturbating to orgasm without porn or fantasy.
1. If you have a strong erection on #1, but problems on #2, then you have porn-induced ED.
2. If #2 is strong and solid, but you have trouble with a real partner, then you have anxiety induced ED
3. If you have problems during both 1 & 2, you may have severe porn-induced ED, or an organic problem. When in doubt, see a good urologist.
The following 2 links are to Medhelp threads on porn-induced ED. Read the stories. If you want to know more locate my first 2 posts on the link #1
http://www.medhelp.org/posts/Mens-Health/22-with-porn-inducederectiledysfunction/show/469209?page=1
http://www.medhelp.org/posts/Mens-Health/Too-much-porn-masturbationcause-ED/show/183203
On GOOGLE VIDEO find “Erectile Dysfunction And Porn” - watch the video series.
Here’s a Psychology Today article on it
Porn-Induced Sexual Dysfunction Is A Growing Problem
http://www.psychologytoday.com/blog/cupids-poisoned-arrow/201107/porn-induced-sexual-dysfunction-is-growing-problem
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RESEARCH FROM ITALY
SCIENTISTS: TOO MUCH INTERNET PORN MAY CAUSE IMPOTENCE (2011)
It may not make you go blind, but Italian scientists have identified a worrying side-effect of watching too much pornography.
Researchers said Thursday that young men who indulge in "excessive consumption" of Internet porn gradually become immune to explicit images, the ANSA news agency reported.
Over time, this can lead to a loss of libido, impotence and a notion of sex that is totally divorced from real-life relations.
"It starts with lower reactions to porn sites, then there is a general drop in libido and in the end it becomes impossible to get an erection," said Carlo Foresta, head of the Italian Society of Andrology and Sexual Medicine (SIAM).
His team drew their conclusions from a survey of 28,000 Italian men which revealed that many became hooked on porn as early as 14, exhibiting symptoms of so-called "sexual anorexia" by the time they reached their mid-twenties.
There was some good news, however, as the condition was not necessarily permanent. "With proper assistance recovery is possible within a few months," Foresta said.