This one might be a little raunchy, but it was told to me by a 94 year old woman, so don’t blame me :)

An elderly woman stands in front of a store and touches alternately her head, her breasts and her crotch. After a small crowd gathered around her watching this spectacle, finally she was asked by a young boy why she behaved in such an inappropriate manner, thereupon she answered, well my dear, I just want to remember to buy a head of cabbage, a carton of milk, and a rice brush.