Venus and Bella pretent 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. He's said he only likes sex where he sticks his penis in a vagina, but his cock is saying otherwise. Every time the on screen male gets his ass fucked, Sam's penis gets harder. This is just the results 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. This hot medical play threesome is a feature shoot and has some fine ass fucking and great threesome sex. Sam gets used and tossed out like one of those paper sheets!