Overheard “In the first few days, she squealed for cigarettes every now and then, but as her life became more colorful, she gradually forgot about them altogether.” A zookeeper on Ai Ai, a chimp at a zoo in China that has finally quit smoking after 16 years. (Ananova.com) “We make kids wear helmets and knee pads,” Dr. Goldstein said. “But no one thinks about protecting the crotch.” a Boston urologist, Dr. Irwin Goldstein on new studies showing the link between bicycle saddles and impotence. (NY Times) ”We call him our ‘missionary lizard,’ “ Looy said. ”When people realize the T.…