I don't know. I'm kinda new so I cannot tell and compare with "a before". I would have think that things can get messy behind the curtain and it's a kind of security for the girls to tell clients "you're on record so behave".
If that's the case it could be a good incentive for the girls to be "safe". But I'm just making hypothesis.
Once I was told a rules of no kissing the body.