Flying to Los Angeles from San Francisco the other day a passenger noticed that the ""Fasten Seat Belts"" sign was kept lit during the whole journey although the flight was a particularly smooth one. Just before landing he asked the stewardess about it. ""Well"" she explained ""up front there are 17 University of California girls going to Los Angeles for the weekend. ""In back there are 25 Coast Guard enlistees. What would you do?""