Sister #1 decides to take a bath. Goes upstairs, turns on the bath water, disrobes, and is about to dip her toe into the water when she stops and yells out: "Sister, Oh Sister! I forget! Am I getting in or getting out?"
Sister #2 says: "Just a minute, Sister...I'll be right up!" Half way up the stairs she stops...turns around and says to sister #3: "Sister? I forgot! Am I coming or going?"
Sister #3 shakes her head and says to herself: "Thank you, God, I am not as bad as either of them...knock on wood", and she knocks three times on her head. She then hollers out: "Just a minute, Sister, I will be there as soon as I answer the door!"