After a long bout of explaining my idea behind the harvesters, I finally got a single male out of all the delegations to pick a girl they fancied the most only to be lead to the shining doors. It took only a short moment for sweet moans to start seeping through the small holes between the door and threshold, showing that despite my orders, some of the girls couldn't help but try to use this opportunity to rack some favours from their respective clients.
All in all, the only this they were required to do, was to arouse them. While I didn't understand the process yet, after all the experiences I had with Eve and other girls, I knew for sure that for the yang essence to be either produced or freed from the shackles of the man's body, it was required to bring him to the climax.