I think it's referring to excessive ejaculation in general, regardless of the method. "Excessive masturbation" being a symptom of obsessive behavior. No, there is no "masturbation gland." Your body won't know the difference between intercourse and masturbation. Supposedly, it takes about 36...
Of course we want it to be bullshit, because we all love to do it! But seriously, is there any truth to this or what? Numerous web sites claim over-masturbation to be a factor:
http://www.herbolove.com/article.asp?art=62
http://www.goaskalice.columbia.edu/2008.html...