Ditto for being careful. The world is MUCH too crazy these days, needless to say.
As far as we're concerned, it's a rarity that anything with a stranger goes beyond flirting, light touching, or teasing. Most opportunities we've had for playing has been with friends or acquaintances that she knows who are trustworthy. In that context, there are *********. She is free to do what she wants or allow what he wants with no questions.
We do have 'rules', mostly related to safety. She/we can't put ourselves in vulnerable situations where safety could be compromised.
Violence of any kind is not tolerated in any form or fashion, needless to say.