Dr. John H. Kellog of Battle Creek, Michigan says

" Enlarged Prostate. -- This painful affection is a frequent result of the chronic irritation in the urethra, which the gland surrounds, the morbid action being communicated to it by its proximity. A diseased action is set up, which results in enlargement and hardening. It is felt as a hard body just anterior to the anus, and becomes by pressure the source of much additional mischief. Sometimes the disease progresses to dangerous ulceration. It is attended by heat, pressure, and pain between the anus and the root of the penis.

   Permanent enlargement of the prostate is a very serious matter, since it interferes with the proper discharge of urine from the bladder, which ultimately leads to disease of the bladder itself, and may result even in death. This condition is the result of other forms of sexual excess as well as self-abuse."

And he also says:

"If it be argued that an occasional emission is necessary to relieve the overloaded seminal vesicles, we reply, The same argument has been used as an apology for unchastity; but it is equally worthless in both instances. It might be as well argued that vomiting is a necessary physiological and healthful act, and should occur with regularity, because a person may so overload his stomach as to make the act necessary as a remedial measure. Vomiting is a diseased action, a pathological process, and is occasioned by a voluntary transgression of the individual. Hence, it is as unnecessary as gluttony, and must be wasteful of vitality, even though rendered necessary under some circumstances. So with emissions. If a person allows his mind to dwell upon unchaste subjects, indulges in erotic dreams, and riots in mental lasciviousness, he may render an emission almost necessary as a remedial effort. Nevertheless, he will suffer from the loss of nervous energy just the same as though he had not, by his own concupiscence, rendered it in some degree necessary."

But read it all for yourself at the University of Virginia, no less.   You want me to do all of your work for you or something, huh?