A couple of years ago when I was about 15, a few of my friends had arranged a gathering, there were five girls, so it was clear from the start that the night was going to be interesting, but not quite what we expected.
I had mentioned about masturbating to some of my friends before, and they were all quick to deny it. We were playing spin the bottle, and without realising it was just me and my best friend left playing alone. The subject of masturbating came up again and this time she seemed quite open about doing it and we were both pretty horny. We decided to take it upstairs, to be alone and do some 'experimenting' together.
Sadly we were prematurely interupted by a friend, who had realised what we were doing and wanted in on it. We said she could come in, on the condition that she joined in. Surprisingly, she had never done it before, so my friend and I were quite willing to demonstrate it to her.
This was all very fun, but, she didn't seem that keen on the idea and me and my friend were.
When I realised what we were doing I remember my electric toothbrush and all the fun it had brought me before, so I told her about it. Immediately, we ran off to get the toothbrush and took it in turns to pleasure ourselves.