Being a professional public masturbator has been a hot fantasy of mine since grade school. Even as early as age nine or ten I was constructing an elaborate fantasy world in which nudity and masturbation were not only permitted in the public arena, but even celebrated. I did most of my wanking in my bedroom, but masturbating around the house or, better still, outside–heaven! In my early teens, I jacked off to a fantasy that I gave a live masturbation demonstration for a sex-ed class. Teacher selects me because she knows about the jack-off shows I put on in the back of the school bus in fourth grade. I’m already nude (in my dream world people go nude frequently–and I have a note from my mother) and by the time I’m in front of the class I’m hard and throbbing. Joined by a female classmate (also a school-bus-wanker), we make a show of demonstrating different masturbation techniques as the teacher directs and narrates. By the time we both cum, the whole class has devolved into a masturbation orgy, with even the teacher stripped from the waist down and furiously strumming her clit.
I read my parents’ copy of Human Sexual Response when I was a teen, and the descriptions of their orgasm studies (in which subjects masturbated in the laboratory), while clinical, ignited another genre of fantasy: masturbating for science. I had many stroke sessions imagining that I was a test subject jacking off under observation. Of course, the cute grad student who wired me to the recording machines has to finger herself as I masturbate, which sends me shooting an epic load all over myself, recorded for posterity (and future masturbation sessions at the clinic).
Source: (53) exposed jerkoff fantasies – Page 7 – Onania Masturbator Forum