The future: The internets.

Amy Taylor, 28, filed for divorce after she caught her husband cheating in Second Life, an online community where players create avatars and transport themselves into virtual worlds. "I caught him cuddling a woman on the sofa in the game," Taylor told England's South West News Service. Taylor married Dave Pollard, 40, after the pair met in an online chat room in 2003. She said the first sign that their marriage was in trouble occurred in 2007, when she caught her husband's avatar having cyber-sex with a virtual prostitute.

People become emotionally invested in their virtual identities, according to Ellen Helsper, a researcher at the Oxford Internet Institute, who has studied the impact of the internet on relationships. "For a while, there was this impression that as long as it's online, it doesn't matter," she told the Associated Press. "But research has shown it's not a separate world." She added that infidelity was "just as painful, whether it's electronic or physical."