Keeping Secrets

At a dinner party, several of the guests were arguing whether men or women were more trustworthy.
"No woman," said one man, scornfully, "can keep a secret."
"I don't know about that," answered a blonde female guest. "I have kept my age a secret since I was 21."
"You'll let it out some day," the man insisted.
"I hardly think so," responded the blonde. "When a woman has kept a secret for 27 years, she can keep it forever."