My criteria for this to be answered perfectly are as follows:
1. There must be some method to "level up" via a variety of methods that involve in gain from some sort of experience points. And this must be substantial, if not limitless.
2. There must be a high thresh-hold for people to obtain...
Fair fair, we all know the most fetishistic and degenerate thing any consenting couple could do is handholding. Cant believe these perverts do that in public