I must have been 12 years old when this happened. It was me and 3 girls all about the same age playing truth and dare. It turned out to mostly be dares and being the only boy a lot of them were directed to me. It was pretty tame at first but then one girl dared another to show her tits to me and she did. That girl them dared het to let me kiss her nipples so she lifted her top and let me. I dared the other girl who hadn't shown anything to show us her tits and she did. A girl dared another to get naked and to stay that way for at least an hour and she began the dare. I remember not minding this game but the next dare was directed to me. I had to get naked for at least an hour like the other girl. I stripped and was naked like her and drawing attention for all of them. I guess my penis had their attention. It was the naked girls turn to dare and she dared the other 2 get naked 2 and they did. The 4 of us were sitting there naked together and we stopped doing dares but began to ask questions to each other. The girls seemed curious about my penis and asked questions about it and even touched it. I was curious about them and asked about their vaginas. It became more of a show and tell and we got a very good biology lesson of the opposite sex. No one seemed shy and we all saw and learned much about each others bodies. Each of them let me take a look between their legs and any mystery I had about vaginas had disappeared. They in turn got to see and touch my penis. There was a little touching but nothing that would be considered really sexual. At the end we all got dressed and this never happened again.