Masturbation is normal, and even healthy when used properly. Just as are most things in life.
However, there can be "too much of a good thing". When someone masturbates excessively, the results can be sexual exhaustion, weak erection toward impotency, and premature ejaculation. The affects of this will be that it is hard to satisfy a girl and keep a good marriage or relationship.
You have trained your prostate ejaculation nerve to come quickly. This kind of masturbation training is the same as the martial art that trains the hands to intuitively react once the visual nerve is stimulated by other people's hands.
On the flip side,
Alex McKay, research coordinator for the Sex Information and Education Council of Canada commented that many people currently feel guilty about masturbation: "The reason is that sex is supposed to be geared towards reproduction, and masturbation is about as far away from that as you can get...There is now a wide-ranging consensus among health professionals from all disciplines that masturbation is psychologically healthy and something most people do." Sex therapists Bill and Carolyn Chernenkoff from Saskatoon, SK, promote both mutual and private "self-stimulation." They say there's nothing more healthy for hormone-crazed teenagers than masturbation. If the kids are engaging in masturbation, then they won't be practicing sexual intercourse to the same degree, and risk catching STDs or becoming pregnant. 2
R. Jandl commented in an "Ask the Doctors" column that masturbation has a number of benefits:
It enables the playing out of pleasurable sexual fantasies.
It releases sexual tension and often produces a pleasant, tranquil feeling.
It helps a person become more comfortable with their own sexuality.
It is an enjoyable experience when shared with a partner.
It can curb impulses to have inappropriate sex with someone. 3
Other references list additional benefits associated with masturbation:
No one gets pregnant by masturbating.
It helps maintain good pelvic blood flow and strong pc muscles.
It is safe. Sexually transmitted diseases are not transmitted during masturbation.
It's great for stress relief and can help you sleep.
It can temporarily relieve menstrual cramps in women.
A person can learn about the sexual responses of their own body, and thus be better prepared for sexual activity with a partner at a later time.
Some negative factors have been cited:
Among males, frequent and vigorous masturbation can produce skin abrasions. This can be avoided by using a lubricant such as KY jelly, Aqua-Lube, saliva or even soap and water.
It does take time away from other activities. Some younger teenagers masturbate a few times a day.
Prolonged sexual arousal in males without an ejaculation can cause pain due to blood congestion in the genital area. This is often called "blue balls". It is easily avoided and dissipates after a while.
People may masturbate throughout their lifetime without any deleterious side effects.