Replying...
Intro. You have been accepted as a participant in a secretive college psychology study known only as 'Project Male Sexual Arousal'. After you arrive, you are asked to sign a pile of agreements and releases. You are taken to a lab room, furnished like a doctors office, except the exam table had restraining straps and stirrups, alot of spot lighting, a large tv screen mounted to the wall above the table, cameras and a strange curtain at one end of the room.

Secret psychology lab.

@SILAS