A general, a colonel and a major were having a heated argument on the subject of sex. The general maintained that sex was 60 per cent work and 40 per cent fun. The colonel said it was 75 per cent work and 25 per cent fun. The major thought it was 90 per cent work and 10 per cent fun. At the height of the argument, a private appeared at the door.

"Let s leave it to him," said the major.

The private listened carefully and said with an air of absolute finality, "If you will pardon me, Sirs, sex is 100 per cent fun and no work at all."

"How do you figure that?" cried the astonished officers.

"It is very simple," said the private. "If here was any work in it at all, you guys would have me doing it for you."