This happened when I was 15
I have always been able to have orgasms very easy. If I felt like getting off I could just press on my crotch through my pants and I will start to orgasm in just a few seconds. It is usually nice because if I get turned on I can sneak in orgasms even if people are around sometimes. Sometimes it can happen when I am not planning on it though..
Once when I was 15 I was staying at a friends house one night on a weekend and a few other friends stayed over too. We all hung out and watched movies, and chatted and goofed around, just normal girl stuff. It started to get late and we had all changed into our PJs, and we were kind of bored and hyper so we ended up playing truth or dare.
It started off pretty normal, but after a bit the questions and dares started to get more sexual and it was obvious we were all getting kind of horny. We were all still pretty inexperienced so the dares were silly like show your underwear, or show your boobs and stuff like that. I have always kind of been attracted to girls so I noticed that I was starting to get a little excited.
My friend Kelly ended up getting a dare where she had to choose somebody and give her a sexy lapdance. When she picked me, I totally got butterflies and suddenly got extra horny. She started doing her little dance and we were all laughing, but in my head I couldn't stop thinking about the pulsing feeling in my crotch and how sexy her tight shorts and soft legs were. She then turned so her back was to me and started grinding her butt into my crotch... and then it happened.
She put both of her hands on each of my knees and pushed my legs apart a little and started moving her butt up and down and shaking it right in my already super turned on crotch. Within like two seconds I felt the feeling building up and I knew I was going to cum. I tried to hold it back and kind of pull my crotch away from her, but it was too late. I leaned back on the couch and started shaking, and it felt so good I had to reach my hand down and rub through my shorts.
Everyone kind of stopped and stared as I was sitting there rubbing my crotch for a couple of seconds and then I was able to regain control of myself and sat back up...I was super embarrassed sitting there still with my hand jammed between my now closed legs as one of my friends blurted out, 'I WANT ONE OF THOSE LAP DANCES TOO!' and everyone laughed kind of breaking the tension.
The game stopped after that and we all started talking about what happened and the conversation had everyone very horny.... maybe I will write about the rest of the night another time.