hummmm... an electric toothbrush? verrrrrrry interesting!
No it won't hurt your vagina, as long as you keep it and your self clean you should be fine!
Hi, i thought exactly the same thing once. I found my old electric toothbrush and since i was too young to buy a proper sex toy i thought i could use that.
I used it and it gave me an instant amazing orgasm which was really nice. It didn't appear to affect me and it was really good.
I would be careful though, obviously it will be different for different people so...just be careful.
an electric tooth brush??? for masterbation? why on earth would you use a tooth brush to masterbate with??? if it's the vibration you want they DO make vibrating dildos you can buy at any adult store. those are a lot safer and probably more enjoyable to use then a toothbrush.