At some point in the lab Joe and Nicky are split up for separate experimentation, but it’s only so that the guards can abuse Nicky. They edge him for days and bring him to the point of orgasm so many times it becomes straight up torture. Then Keane comes in and says the only way Nicky will be able to come is on his cock, while riding him. Nicky refuses but is forced on Keane’s cock anyway and to his surprise begins to move and ride him. When Keane finally allows him to come and just before he climaxes, they bring Joe in to watch the whole thing.