Casanova was on his deathbed. He was full of guilt and wanted to confess to his wife. He said, "I cannot die without telling you the truth. I cheated on you throughout our marriage. All those nights when I told you I was working late, I was with other women. And not just one woman either, I've slept with many."
His wife started sobbing. After a moment, she calmly looked at him and said, "Why do you think I gave you the poison?"