I'm rather a shy, inexperienced girl just finishing my first year in college (UK college that is). I'm about 5' 8' and quite slim and curvy, but for some reason have only had one relationship and he was a little soppy and we didn't really work. So I'm quite taken to playing with myself, gently but frequently! I often do the 'traditional' method of lying on my rented flat's bed, knees far apart rubbing my clit and slipping a couple of fingers in, and also 'hump' a few pillows or a soft eiderdown duvet rolled up; weird but incredibly arousing!
I'm not sure quite how I worked this out, but if you get one of those small, small bottles of orange/tomato juice like you have served in pubs (150ml I think), the neck fits perfectly inside your vagina! I've only done this twice, but I discovered that if you get yourself quite wet and slip it up, gently sliding it in and out is amazingly powerful and you can collect a few drops of juice if you like that sort of thing; it tasted weird but it's a technique maybe some of you girls might like!