What is a good bet for a football game for a couple?

So i've been dating my boyfriend for 2 weeks. But we went out a year ago so we have a little history. The Steelers and Jets are playing for a spot in the Super Bowl. He's confident that the Jets will win and i go for the Steelers and so we want to bet on it. We're both 17 and are taking our relationship serious and slow. What is a good, funny, and NON-perverted wager?