The quick marriage proposal

At a country-club party a young man was introduced to an attractive girl. Immediately she began flirting at him and and flattering him outrageously. He liked the young lady, but she was taken a bit aback by her fast and ardent pitch. Hhe was really amazed when after 30 minutes she seriously proposed marriage.

"Look," he said. "We only met a half hour ago. How can you be so sure? We know nothing about each other."

"You're wrong," the young lady declared. "For the past 5 years I've been working in the back office at the bank where you have your account. I know all I ned to know about you."