Usually when we handed out Hx bonuses at the end of the game we would justify them somehow, like "your character knows mine better because we did [such and such] together during the session." So I think there's already a spark of inspiration there. If you reset your Hx, it prompts you to keep talking about that situation.

That's just an observation of my group's behaviour--I've only played AW with about 5 different people. Maybe other groups don't do that?

And if your Hx resets in play, it's because of some move or because of dishing out harm, so there's something there in the fiction already.

That said, I don't see why we couldn't brainstorm a little list of examples to start and maybe add stuff when people use this move in play:

When someone else resets their Hx with you, choose 1:
* Tell them a secret about yourself.
* Tell them about some habit you have, annoying, endearing, or otherwise.
* Tell them how you are vulnerable.
* Tell them what you really think about something they care about.

I really like this. Fortunately, I've only run the intro session for my group and no one has had the opportunity to reset history yet, so this is definitely going on the table.