It's all about nutrition.

[Wilf]

A man goes to the doctors, complaining that he always feels tired.

 

On asking the relevant questions the doctor finds out that the guy lives solely on snooker balls, washed down with tapwater.

 

When prompted, the patient says that he eats a cue ball and a couple of reds for breakfast, the spare cue ball and three or four more reds for a light lunch, and then for dinner, he finishes off the reds, followed by a dessert of yellow, brown, blue, pink and black.

 

Yes, you've guessed it.....the doctor told him he wasn't eating enough greens.

[Big J R]

I always said the old ones are the best !