"I'd do anything for you," whispers Blair Witherspoon to girlfriend Erica Hoskey. That includes giving her the Tweety Bird he won shooting baskets at the Butler County Fair in Pennsylvania. Sweet talk and gifts fuel romantic passion. But biochemists say this feverish stage of love typically burns out after a few years. Why? Perhaps the brain can't maintain the intense neural activity of infatuation.
Photograph by Jodi Cobb