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 embaracing, 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 apear that you have the early symptoms of Tom Jones syndrome."
"Well I've never heard of that, is it common?" asked the man.
"It's not unusual," replied the doctor.