Is it OK for a girl to start Masturbating at 13 years old?

Yes it's o.k. I'm 21 and have been masturbating since I was eleven. I discovered while taking a shower that the water hitting me on my clit felt good and I got all tingly inside. I didn't start using penetration until I was around thirteen when I discovered that the ribbed handle of my razor (blades removed of course) felt really good sliding in and out of me. After that I was experimenting with all kinds of things from hair brush handles to carrots until I got my first vibrator. In fact, I'm pretty sure through all my playing around I broke my own hymen. When I had sex for the first time at seventeen it didn't hurt and I didn't bleed at all. There is nothing wrong with you masturbating at your age. You are a young woman and a sexual being. Welcome to the club sister!