Venus and Bella pretend to be lab technicians in a sexual arousal study. The goal of the research is to determine sexual identity in males. With electrodes hooked to his penis, Sam sits in front of a monitor playing porn. When he starts to get turned on, the electrodes measure his erection. When a scene from TsSeduction plays, his cock starts to perk up. This is just the result Venus and Bella were hoping for and not because of the study but because they can now fake a set up for "part two" of the trial and have him use his now hard cock on Bella before Venus gets in there with her own cock!