An attractive American girl was tripping down a street in Paris, minding her own business, when a young Frenchman picked up her trail. He followed her for a block or two, murmuring gentle compliments.
She became angrier every moment and at the end of the third block flounced over to gendarme. "That man has been following me," she reported indignantly.
The policeman surveyed her, took off, his cap and bowed. "Mademoiselle, if I were not on duty, I would follow you myself."