First of all there are several myths, which need clarification. There must be several teenagers who are following similar practice (of course their method varies). It is called masturbation and it is normal physiological urge.Masturbation doesn’t make you unable to enjoy sex in long run (sexless as you mentioned). The thick fluid is a lubrication that a woman releases to make the intercourse enjoyable and painless.Since you don’t enjoy the insertion process anymore, u don’t lubricate anymore.You will start lubricating once again when u will start enjoying the love making with your life partner.No, the husband will not know about the masturbation habit unless he is told about. There are several gels available if incase you fear lubrication.