English private school - traditional curriculum - strict uniform - and Latin!
And as luck would have it, the classroom we had for Latin was south facing, high on the cliffs overlooking the English Channel. The sun and heat flooded into that stuffy room, and the teacher must have had thin blood. She always had the windows shut, and I suspect the heating was always on a bit too.
We sat, droned through the texts, and sweated! Our long woollen skirts didn't help either. But then, I discovered a 12 inch ruler! It could be made to reach up my skirt.
For days I used to just tickle myself, get a nice buzz going, drift off into a horny little fantasy. Oh, I loved Latin then. Each lesson was two hours of sexual tension and damp panties.
But then, one day, I was rubbing my clit through my panties, and feeling that familiar little buzz when all of a sudden it became a roaring train, and, despite myself, I came in my panties. My first ever cum!
And it was noticed by my friend. Sara looked long and hard at me before scribbling 'You lucky bitch', on her pad.
After the lesson I dashed to the bathroom. My face and neck was flushed red, but it was the wetness between my legs I was worried about. My panties were soaked, I think most of it was my sex, but some was undoubtedly pee too.
I peeled my soaked panties off and stuffed them in my bag.
Later, in the dorm, Sara wanted to know everything, what I had been doing, thinking about and what a cum felt like. (As if you can describe it!)
Over the weeks that followed we talked about it all the time and I went from strength to strength. From cumming with a ruler I could cum by just squeezing my thighs together! Neat huh?
And better yet, each cum was less messy than the last. Oh, I learned that a messy cum is really nice sometimes (and I liked peeing too), but in class, I could get myself off really easily by the end of that year.
Sara and me? Well, yeah, eventually I showed her how to do it, and I mean showed her by doing it for her and for the following year, we explored each other a lot.
So, there it is. My first cum.