As a general rule, no. Constant masturbation could inhibit your ability to perform in some cases, but not likely.
Yes and no!! It wont affect your sex life in a bad way,not at all:-D But it can affect your sex life in a good way.When you masturbate,you will learn to know your body and your p***y/penis.That is a good thing.Masturbate so often you want,some people does it once a day or once a week/month.But some does it 1-2 times almost every day. I can do it 3-5 times a day,not every day,because sometimes me and my gf have sex.Those days we have sex,we are in bed the whole time.
If you are in your early teens,I will tips you to ask other teens,(friends of course) to masturbate with you.BTW,my gf and I are 14 year,Then you can learn from eachother.And it is sooo good just to lay on the bed,and somebody gives you orgasm after orgasm,you can only relax and take what you get,LOL.But don't involve kids that are younger than yourself,and you all must agree to masturbate or have sex.:-)