This happened last year. I was staying at a friends house for the weekend. She was a very well endowed individual. We were watching a movie and I started to get that feeling in my pussy. I knew that I had to get off or I would explode. I was covered with a blanket and was not wearing any panties. I took my hand and slowly inserted it into my shorts and started rubbing.
I was so engrossed that I did not notice that my friend had removed the blanket and was watching me. After I came she asked what was I doing. I told her that I was masturbating. She looked at me like I had two heads. I told her what it was and that I would teach her. She agreed fairly quickly.
I told her to take off her clothes and I would take mine off. She stripped slowly. As she took her panties off I noticed that her panties were soaked. I quickly took off my clothes.
I asked if I could touch her down there and she said yes. I reached out and found her clit. As I touch it she shivered. I told her that this is your clit and all you do is rub it. I kept on rubbing and her breathing became deeper. I asked if I could put my finger in her and she was hesitant but said yes. I told her that it would feel like you need to pee but just let it go.
I inserted my finger and started massaging her g spot. In about two minutes she said that she was going to pee and I needed to stop. I said don't worry you won't pee. A minute later she yelled, Oh my god I'm cumming. She squirted all over the place and collapsed. After she recovered she said thank you. This was the first and only time I experimented with another girl.