One Hand Slapping?
It’s a well known fact that Japanese men are some of the most hardcore, sex crazed men in the world. The sinful things they have introduced to this world includes school girls, anime porn and so much more.
Now they are turning the sex industry upside down by introducing pay-for-self-service sex. I mean, there are many sex movie places already that lets you do all that (I heard from friends of course), but this takes it up to a whole new level.
Basically, you pay for a girl to join you and as she exposes herself, you play with yourself. It’s the safest of sex. And since there’s no physical contact, you pay less and the girl earns less.