I can't remember which came first, but I had three when I was in school that are always my fondest memories when it came to seeing a thong for the first time.
The first one was my English teacher, she was probably early 30s when she was teaching us teenagers, and there wasn't a lot of younger teachers in our school. So she always tended to be everyone's favourite. Anyway this one day, she was wearing a white t-shirt and black trousers, we were all in class and she'd just finished explaining something to us at the whiteboard before setting us off on a task. As we started to work, she'd dropped a pen and eraser on the floor while she was talking to us. With her back to the class, she squatted down to pick up what she dropped earlier, and her t-shirt rode up and revealed that she was wearing a white lace thong which was now peeping up above her trousers. I remember it vividly because the waistband was twisted and I didn't have her down as a thong wearer so it was pretty hot.
The other two stories involve girls in my classes. One time we were in Science class and the girl with the fattest ass in the whole school was sat in front of me. To be fair, she was pretty fit, but her ass was huge. And I'm talking huge. No matter what style trousers she wore, they were always skin tight around her ass. Well, in science class, rather than sitting at normal tables with chairs, we were always at higher tables where you could stand or could sit on one of the stools. She was sat on one of the stools, and her trousers dropped slightly, and her polo shirt had risen slightly to reveal that she was wearing a white cotton thong. It wasn't a sexy thong by any means, but seeing her in a thong filled my wanking memories for a very very long time.
The final one was again in a lesson. The girl in question was one of the most popular girls in school, and the one everybody fancied but she'd also end up being with someone who was a few years above us in school. This day we were in a Maths class, and she was at the very front of the class, and I was sat in the row behind her. She was probably the type of girl who wore more risqué trousers because she knew everybody fancied her. Well, on this day, she leaned forward in her chair to rest her head on her arms, and as her t-shirt went with her, a black thong came into view, but it wasn't just any black thong, it had a giant pink silk bow attached to the back of them. How she hid it in her trousers all day without having a bump in her trousers, I don't know. But it was so hot.
Those are my three fondest memories, and the ones I remember first.
