Masturbation Class

Since I was very young, and still to this day, I have a fantasy of collective masturbation in a classroom. We're long in a distant future, and at school there's a proper sex & masturbation class as part of the curriculum. 
It's 2 hours/week, so twelve lessons, and it is done in a mixed classroom. The fantasy follows the characters as the experience evolves. 
Pupils are 18 or 19, or whatever the legal age for consent is on that planet, and they are led to a special big room with vintage (so, from our era) armchairs and sofas, put up in a sort of circle. There’re around 15 people. There's a contrast between the minimalistic surroundings and plushy seats, wooden chairs. The classroom has a wall made with windows, which looks out on a garden. All throughout the year the pupils are taught about the body, eroticism, pleasure, masturbation and their benefits, and encouraged to liberate themselves from shame, get naked and eventually cum in front of everyone. No one is forced to attend but we all do, even the shyest ones because we know it's good for us. The class is self-touch only, no touching others is allowed. 
Nudity is not mandatory but gradually encouraged. Body diversity is addressed and everyone soon starts feeling comfortable in their own skin. Stories are told by everyone in turns, about their bodies, their discovery of pleasure, their preferred techniques. Toys are provided on request for everyone, to satisfy curiosities and explore deeper. The teacher is a moderator of discussion and an information provider, when needed. At some point it is clear that he/she is not human but Artificial Intelligence, and feels no desire. From these premises the fantasy evolves and sprouts many different little scenes.
 Second lesson: the first brave volunteer for a masturbation demonstration is a brunette girl who just can't deal with the horniness of the whole situation and just humps the velvet armrest of her seat until she cums. No one notices it until she goes off the rails and cannot hide the pleasure anymore. Fourth lesson: class is encouraged to watch from a very short distance the physical signs of orgasms. So every one is in couples or small groups, and in turns everyone intently watches the other while she/he masturbates, and takes notes on technique, rhythm, and orgasm signs such as redness on the chest, twitches, contractions etc. A girl is using a hitachi vibe on her clitoris. The guy in front of her is mesmerized when he sees her pussy pulsate and contract rhythmically during orgasm, and says “IT’S THE SAME AS BOYS! - why do they say female orgasm cannot be “seen”? it’s right there!
 The scene climaxes - sorry for the pun - at the end of the school year, when in the final class everyone is naked and everyone just goes to town on themselves wildly and with terrific abandon. Everyone cums watching each other cum. The end.