Don't Bet On It

A husband and wife were sharing a bottle of wine when the husband said, "I'll bet you can't tell me something which will make me happy and sad at the same time."
The wife thought for a few moments, then said, "How much are you willing to bet?"
"One hundred dollars!" said the boisterous husband.
"That's all?" inquired the wife.
"OK, two hundred."
"Not too sure of yourself, are you?" teased the wife.
Feeling pretty good, the hubby announced,"Five hundred!"
The wife twinkled her nose and calmly said, "Your pecker is bigger than your brother's."