A wife is going through her husband's closet one day when she finds a metal box. Inside the box she finds 3 golf balls and $20,000. She immediately goes downstairs and confronts him with it.

Wife: "What is this box for?"

Husband: "Well, every time we had bad sex I put a golf ball in the box."

The wife thought this was pretty good seeing as how they had been married for 20 years.

Wife: "What is the $20,000 for?"

Husband: "Every time I got a dozen golf balls I sold them."