When I was nine I had my first sexual experience, but at the time I didn't know quite what it was. I was going to the bathroom and my stepsisters were over. One of them was in the bathroom, so I waited patiently for her to get out. She said that I could come in, so I did. She was just standing in there (clothed I might add) and she was staring at me. I'd had a crush on both of them for a while.
She then said, 'Let me look at your thing.'
I replied, 'What thing?'
She reached down and grabbed my dick, replying 'This thing.'
I had an instant hard-on at that moment, so I turned to her and said, 'Only if I can see what you have down there.'
At this point in my young life I was aware that girls were different than boys. She unzipped her pants and pulled down her panties to expose her small pink pussy. I pulled down my pants to reveal my dick. She started to rub it and I started to finger her. We had just barely got started when my mom called us to find out what we were doing. We stopped and put our 'things' away.