The Blood Countess forgets

The widowed Countess Elizabeth Báthory bathed in the blood of young women to keep herself youthful.

"Pass me the soap, János."

"Mistress, we are out of soap."

"Who neglected to buy soap?"

"Ilona."

"I will bathe in his blood too. That will teach him to buy soap."

But it didn't. Instead she was infected by his forgetfulness.

"Whose blood do I bathe in again?"

"Young women."

"Ah yes."

She made a note of that and stuck it on the wall.

"Don't let me forget."