In case, you have to masturbate, you may follow the following precautions. It will be less harmful and will give you more enjoyment.
Do not masturbate with dry hands.
Do not visualize intensely.
Do not masturbate when you are excessively excited.
keep your perineum relaxed till you want to ejeculate.
Continue breathing during masturbation.
Pocket vagina is sold in the market. It is claimed that it gives pleasure as good as a natural intercourse. I do not know whether it is available in India.
The author of the original book entitled' 100 days to good health, better sex and longevity is Dr.Eric Steven Yudelove.
A book on Taoist yoga, it is a Indian version of 100 days to good health,better sex and longevity.It is available at Bangalore.I am sure one can activate microcosmic circuit in 14 weeks, if he faithfully practices according to the book's guide lines.
Thee are number of websites on this subject.
To convert sexual energy, you need to learn microcosmic orbit. You may circulate aroused sexual energy on this circuit.For this you will need to learn, breathing, acivating perineual , sacral and cranial pump. You may also do deer exercise for man (google it).You may learn sexual reflexology as well. Kegel exercise, Sat kriya are also good for sexual stamina.First you have to create sexual energy and then circulate it on the channels. It is a very interesting subject.Refer to the to-day's post of mine on How to Love? Here i have mentioned few more techniques.
yes its normal for all guys to masterbate, married or not. but if your married most man have sex rather than masterbate.