That was quick

At a country club party a young man was introduced to an attractive girl.
Immediately he began paying her attention and flattering her outrageously.
The girl liked the young man, but she was taken aback a bit by his fast and ardent pitch. She was amazed when after 30 minutes he seriously proposed marriage.
"Look," she 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 man declared.
Immediately he began paying her attention and flattering her outrageously.
The girl liked the young man, but she was taken aback a bit by his fast and ardent pitch. She was amazed when after 30 minutes he seriously proposed marriage.
"Look," she 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 man declared.
Spoiler: