[post_page_title]Where is the love?[/post_page_title]
Perhaps the most common reason why people have affairs is because the magic seems to have disappeared from their relationship. The couple might have gone years without anything changing, and it all just feels a bit stale.
Maybe the couple no longer takes the time to keep the romance alive, and so it just disappears. These people may miss their hearts skipping a beat when they see their partner, and they try to replicate that by starting a new relationship.