Change the Sheets is a utility card.
It recovers some stamina and removes pain counters. You can even use it when there are no pain counters in play, just to gain stamina. It's useful against dangerous Sadists, but what if you're not going up against Sadists? You've lost half the effectiveness of the card, right?
What's better than just removing pain counters? Removing pain counters that give your Furre a bonus! Suddenly Sari is dangerous! Now she can swing AND she's got absurdly high PE values for her cost.
But it doesn't stop there! Throw in some Herm GP and you've got more targets for Change the Sheets:
Fay Mina already needs hir sheets changed.
Best of all, Change the Sheets lets you remove pain counters from as many Furres as you want, so if you have Sari and Fay Mina in play, you can spend 5 AP to remove all their pain counters, turn them into sex fiends, AND recover your stamina!
What more could you ask for?