For his 66th birthday a Texan was given a voucher by his wife for one consultation with the medicine man on the local indian reservation. This medicine man was renowned for his success in treating erectile dysfunction, so the Texan eagerly booked an appointment. When he described his problem the medicine man made him up a potion and told him," take only one teaspoon of this when you want to perform, and say 'one, two three.' Then you can go for as long as you want, and to stop you or your wife must say 'one, two three, four'. This all seemed very simple so the man hurried home to try it out. He showered, shaved and called his wife into the bedroom for a real treat. As she lay on the bed he took a spoonful of the potion and said, "one, two, three" and he rose magnificently to the occasion. "Oh, Honey, that's terrific!" his wife cried, " but what was the 'one, two, three' for?" The moral of this story is that you should not end a sentence with a preposition or you will find yourself with a dangling participle.