A guy asked his grandpa to help his girlfriend with a school paper about World War II. "He's old, but smart," he said. Turns out, Grandpa was not just smart -- he was dangerously experienced. While the boyfriend got stuck in the elevator, Grandpa launched a new kind of blitzkrieg... in the bedroom. No war, just moans. The essay got done, the bed got undone. Grandpa left with a smirk and said, "Best mission since '45." History just got a lot more personal -- and a lot more heated. Sometimes, the past comes faster than you think.