Making a gay or straight test subject have sex with the gender they do not like. could be done with portals, or just machines, or persons.
I would just prefer if they were unable to give in at all. A straight man could like anal penetration if it was done by a female or if he did it himself, but having an actual guy fucking him would be too much. He should not moan in happiness and climax, but swear and wiggle.
forced orgasms ftw.
love a little bit of unwilling play
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