At a four-year-old’s birthday party, the grown-ups were in the kitchen drinking wine when the little boy ran through and said “Mummy! Why is Grandma playing with a shrimp?” The mother poked her head around the door only to see that senility had, once again, forced Grandma to take all of her clothes off. She was lying on the sofa, legs apart, playing with herself. “Erm, darling, that’s not a shrimp that she’s playing with,” the mother replied. “That’s her clitoris”. With a puzzled expression, the boy said, “But mummy - it tastes like shrimp”.