Don't be so hard on yourself. It is a normal thing in most adolescents and many people continue on into their adult years. You are not a bad person. It can be a habit that started out of curiosity. Maybe you really enjoy it. The Puritans were the ones that really were against all forms of sex outside of marriage. If you study the time period they lived in then you would have a better understanding of who they were and what they were doing. many were very perverted people that were troubled by their vices.

I have a degree in Theology, ThB . So, don't think I'm just typing to make you feel better. There is a historical record of events that happened and there is a natural carnal nature in all humans.