Please read everything about the subject that you can. Every medical expert and psychologist will say it is alright, some will even say that it is necessary. They are wrong. It will lead to insanity, just like the religious establishment used to say 900 years ago. I started when I was 5. I nearly went insane. I was doing it 6 times a day. I even got to the point where I was doing it on the job! Then I found that Jesus said that He could make me free. And He did. Now I don't have to hide anything, my wife and I have GREAT sex and I never have to hang my head when I see my kids and tell them to remain holy. God wants you to enjoy sex, but at the right time and in the right way. Save your best for your husband, just as you expect him to save his best for you. And with Jesus in your marriage, your sex lives will be exciting and it will last for many years without sin (and no need for gadgets, videos or depravities).