A man went to the doctor with a strange complaint.
"Well it's like this, Doc, when I drive to work in the morning, through the country lanes, I start to sing 'The Green Green Grass of Home.' If I see a cat, then it's 'What's New, Pussy Cat? It's so embarrassing, even when I'm asleep and dreaming, I still keep singing. Last night, it was 'Delilah,' and my wife was not amused!"
"Yes, it would appear that you have the early symptoms of Tom Jones syndrome," said the doctor. "Well I've never heard of that, is it common?" asked the man.
"It's not unusual...," replied the doctor.