Due to your Moon ruler, you're way more in touch with your feelings than other signs. You may lose yourself in your emotions from time to time, and make your decisions with your heart on your sleeve. That's just what it's like to be in Crab's skin.
You're also highly sympathetic and may have found yourself tearing up when you saw those sad-eyed animals looking for homes on television, or that appeal to help starving children. It's natural for you to want to help others. Your altruism helps make your corner of the world a little better.