Experts say most men have to masturbate, either to reduce stress, help you sleep soundly, and so forth.
Even so, there are medical matters which may never have known about 
masturbation. These are five important things about masturbation is to 
know by men:
1. There was no term "masturbation abnormal
Men often ask if there is something abnormal about the way they 
masturbate. The experts themselves are reluctant to define the word 
"normal" or "abnormal", but they claim that men do it with frequency and
 techniques vary widely.
"As humans, we are too diverse to adopt a particular norm of 
masturbation is normal or not," said Betty Dodson, PhD, sexologists from
 New York as well as author of the book 
Sex for One.
"Every man to masturbate in his own way. Did he use his hands, rubbing 
on something, using sex toys or household objects, wearing special 
clothing, fantasizing, seeing a book or magazine, try a different 
position, or look in the mirror," said Martha Cornog, author of 
The Big Book of Masturbation.
2. Masturbation does not completely secure.
Unlike sex with a partner, masturbation does not transmit sexual 
disease. You also will not experience muscle tension, eye bags caused by
 fatigue, and feeling awkward often faced when having sex with a 
partner.
But masturbation was not fully secured. "Masturbation is the safest 
sexual activity ever existed. But, the laws of physics and biology is 
not going to stop saying that masturbation is safe just because 
masturbation is normal," said Cornog.
The average man knows, if their frequency or too strong to masturbate 
while doing it, and it can irritate the skin of the penis. On the other 
hand, men do not know that the habit of masturbation with a stomach 
condition, for example by pressing a pillow or even a carpet on the 
floor, can injure the urethra. Therefore, urine from the penis are not 
spending as usual, but with a hard spray so difficult to control.
Barbara Bartlik, MD, psychiatrist and sex therapist in New York, said he
 saw a man who suffered severe urethral trauma due to masturbating face 
down so that he could no longer be able to use the toilet standing but 
had to urinate sitting down.
In particular cases are very rare, masturbate or have sex with your 
partner can also cause penile fracture. This painful condition occurs 
because the tear in the tunica albuginea (white tissue surrounding the 
sponge layer of the penis) due to the erect penis of a hard object or 
being forced to bend downward. In an emergency, this often ends in a 
condition required surgery.
3. Own sex change your sex life or vice versa.
For various reasons, when their own sex can benefit. Masturbation can 
help identify your own sexual response-what feels good for you and what 
did not, so you will be better able to explain to the couple about the 
right touch.
It also helps you learn to recognize when the "inevitable" right before 
the orgasm and helps teach couples how to avoid premature ejaculation.
Perhaps most significantly, masturbation is the mechanism or the best 
solution for men who are not able to have sex when their partner while 
on sick or menstruating, or have a sex drive that do not comply with 
himself.
For some men, "solo sex" can become an obsession so they began to lose 
the desire to make love with their partner. Feelings of hurt and 
alienation caused by the couple's obsession with "solo sex" will make 
you difficult to maintain relationships.
The experts stressed, masturbation is fine even for men who already 
committed. "We can not assume that just because a man masturbating, then
 it will reap the problems of the primary relationship," said Bartlik.
4. Some triggers masturbation techniques sexual dysfunction.
The experts warn, the man who often stimulate him in ways that do not 
simulate sex with a partner (eg, stroking very fast or with heavy 
pressure or friction) may be suffering from ejaculation disorder. With 
sexual dysfunction is, someone will be difficult or even impossible to 
reach climax during sex with a partner.
"Anyone who has experienced sexual dysfunction should ask himself 
whether he had masturbated in a manner which has caused a sensation 
different from that obtained from the hands, mouth, or vagina partner. 
Then he must consider what it can stimulate your partner and change the 
way masturbation you to make such a desirable partner, "said Michael A 
Perelman, PhD, professor of psychiatry and urology from Weill Cornell 
Medical College in New York.
5. Masturbation affects prostate cancer risk
A study conducted in Australia in 2003 and published in BJU 
International states, ejaculation associated with decreased risk of 
prostate cancer later in life.
However, in a 2004 study published in The Journal of the American 
Medical Association, a researcher reported that "ejaculation frequency 
is not associated with an increased risk of prostate cancer." In both 
these studies, the frequency of ejaculation include sexual intercourse 
with a partner and masturbation.
Meanwhile, in a study published last January in BJU International showed
 that young men who masturbate frequently higher risk of prostate 
cancer. However, if older men often masturbate, it will reduce the risk 
of prostate cancer. As for having sex with a partner does not become a 
factor against the risk of prostate cancer.
The researchers assumed that masturbation is not the only one that can 
trigger prostate cancer risk in men who masturbate often in their 20s 
and 30s. Men often to masturbate because it has high levels of sex 
hormones. Young men who are genetically inclined to have 
hormone-sensitive at high risk of prostate cancer when their sex hormone
 excess.
Meanwhile, men aged over 50 years of age and often masturbated turned 
out to help dry the prostatic fluid that may contain substances that 
trigger cancer.