Studies have shown that single guys who play golf are thinner than their married counterparts.
The way this fact was determined was as follows: the single golfer goes out and plays a round of golf, has a refreshment at the 19th hole, goes home and finds nothing decent in the refrigerator, so he goes to bed. The married golfer goes out and plays his round of golf, has a refreshment at the 19th hole, goes home and goes to bed, finds nothing decent there, so he goes to the refrigerator.