The dream of romantic love is taken more seriously in North America than it is anywhere else in the world, which is why we believe in fidelity and why we believe in infidelity as well. It is also, of course, what makes our divorce rate as high as it is. Falling in love at first sight and instant gratification are part of the world in which we live, so there are people who believe adamantly in fidelity. They just don't believe in it for long.