Fics like Optimal Thrust Vector

Craig Tucker, a meticulous engineering nerd, has secretly built a programmable sex machine in his bedroom lab, complete with detailed spreadsheets tracking angles, depths, and physiological responses. When his boyfriend Tweek unexpectedly arrives for a hangout, Craig seizes the chance to recruit him as the perfect test subject for initial "manual baseline trials" before activating the device. What begins as precise, clinical measurements and calculated experimentation quickly evolves into raw, passionate intimacy as scientific detachment gives way to overwhelming desire. A geeky tale of trust, obsession, and pleasure where data collection becomes deeply personal.

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