The Crunch Bird (1971)

A woman with a wonderfully full head of red hair has to buy her indulgent husband a birthday gift. She shuns the traditional sporting and gadget ones and alights on a pet shop where she buys him a very rare "crunch bird". He gets home, not exactly in the birthday mood after a day of paying her bills, and discovers his new friend. His words of welcome could have been better chosen. You see, he isn't aware of the trigger phrase! It's short and succinct and I quite enjoyed it.