Sir, I am 26 year old and I am indulged in masturbation habits from last 15 years. I have no control on my will power and I watched porn films daily to masturbate, but problem is that during watching porn film or reading article about sex, a transparent substance leak out from my penis unwillingly. What is that substance, and what should I do to leave this bad habit, can I get normal?

Masturbation is a normal physiological activity seen in young people. However watching porn movie compulsively is not healthy. You need to exercise self control over getting stimulation through porn movies. White fluid which you are talking about is prostatic fluid which is secreted due to sexual excitement. In short there is nothing abnormal with you.  The only way you can get rid of this habits is by self control and distracting you self while you have an urge to act.