I don’t mean to be rude but so much of what you said is total BS. First of all, no, babies do not masturbate in the womb. Where the heck did you hear this? Babies in the womb don’t even have developed sexual organs and aren’t even coordinated enough to grasp down there. Secondly men do not have to masturbate. Semen is produced by the body when it seems the “need” arises and if the man does not masturbate then it is simply either released during sleep or reabsorbed. A man isn’t going to explode if he doesn’t masturbate.
Secondly, to answer why it’s wrong I will give you two answers: a moral theological one as well as an explanation as to why it’s bad for you. First of all, it simulates the act of sexual intercourse. From a Christian perspective, sexual intercourse is something that is meant to be shared between two people, to bring them together and to create life. This is the dual purpose of sex. Masturbation separates sex from both of these purposes and focuses the individual inward to himself/herself. This leads into why it is bad for you. First of all the body during sex releases something called Oxycontin, which is a bonding hormone that causes two people to feel close to one another. This is the same hormone that is released when a mother first hold her baby after it is born; it sort of “seals” them together and is the driving force behind the maternal instinct. Between spouses it unites the husband and wife very deeply to one another. If Oxycontin is released during the isolated act of masturbation, then it’s bad news. It gives a tendency to withdraw: to look to yourself and focus on yourself instead of reaching out to others. There are studies that show that people who masturbate a lot have a harder time connecting with people and developing meaningful relationships. Personally I don’t need studies to tell me this, I know from experience. Deciding to quit made such a difference in my life. There is another really bad effect that masturbation has. When you masturbate, another neurochemical is released in massive amounts: dopamine. It is the chemical that triggers the reward part of the brain. Other activities that cause very large amounts of dopamine to be released are using illegal drugs or drinking too much alcohol too often. Yes, this is what causes addictions. So when you become stressed, anxious, depressed, or whatever, masturbation becomes your default outlet and you become dependent on this behavior. Do you really want this for yourself?
Stop masturbating while you can, you will be glad you did in the future.