Exalted has, in its third iteration, "the Red Rule".
The Red Rule
In almost all aspects, Exalted doesn’t mechanically distinguish between Storyteller characters and those the players control. Here’s the exception:
A player-controlled character can only be seduced or otherwise put in a sexual situation if the player is okay with it. Otherwise, any such attempt fails automatically.
This is completely up to the player’s discretion, and they can waive this rule’s protection if they want their character to be seduced, if they think it would improve the story, or for whatever other reason. This is entirely up to the player, and on an attempt-by-attempt basis—waiving the rule once doesn’t void your ability to call on it later against the same character, or even in the same scene. If no one in your group ever invokes this rule, that’s also fine—but players don’t have to watch their character put into a sexual situation they’re not comfortable with.
Groups that feel comfortable in doing so should allow player characters the full range of their seductive prowess when entangled with Storyteller-controlled characters… although remember that the Storyteller is also a player and their boundaries should be respected.Exalted 3 Core, p222
This kind of rule is pretty much a rule that is put into the baseline table contract to play Exalted. But it is based in that nobody shall be forced to endure something they don't enjoy. And this concept was formulated somewhere else, with some other term. It had to do something with a card, but... I don't remember.