Yoong Liat,
A young nurse was once helping an older gentleman take a little walk around the hospital grounds.
A bird flew over them and left its little 'calling card' on the old man's coat.
Distressed, the nurse said, "We'll have to go back in and get a tissue to take care of that."
"Oh, don't bother," said the man. "That bird'll be miles away by the time we get back."
CJ