In a living-together relationship...

I wear my harness for him every other day and am expected to have it on when he gets home.
I do the dishes (although that's more for vanilla reasons, since we chose chores based on which ones we'd prefer to do) and cook when we eat in.
I tell him how I feel about our experiences. I am not allowed to answer a question with a question or otherwise try to say what he wants to hear.

There are other things that happen off-and-on, but those are the really hard and fast rules.