Zach can’t get his hands off Ben’s chest, covered with electrodes.

Michael is definitely ready for the next part: his electrodes are in place and he’s eager in anticipation.

Álvaro and Max enjoy being in the lab together.

Chris and Dave explore each others’ bodies while Dave is connected to the ECG machine.

You will be asked to undress and enter the laboratory wearing only your underwear. After a brief interview about your sexual preferences and completing the consent form, the lab technician will attach electrodes to your chest. The ECG machine will then be turned on to record your heartbeat. The test will measure your reaction to various sexual stimuli. The technician will then stimulate your body. You are allowed to respond to the stimuli and interact with the technician.

Raul has almost finished his setup: he has already attached limb electrodes and most of the chest electrodes. Liam has four electrodes on his chest and is slowly adding more. This is going to be an interesting ECG session.

Diego is checking if Michael is ready for the ECG: he checks if the electrodes are glued well and gives Michael’s pec a little squeeze.

Nick and Larry are ready for some electrode play