"But without Emily, Greg would feel--paradoxically for such a social creature--alone. Before they met, most of Greg's girlfriends were extroverts. He says he enjoyed those relationships, but never got to know his girlfriends well, because they were always "plotting how to be with groups of people." He speaks of Emily with a kind of awe, as if she has access to a deeper state of being. He also describes her as "the anchor" around which his world revolves. Emily, for her part, treasures Greg's ebullient nature; he makes her feel happy and alive. She has always been attracted to extroverts, who she says "do all the work of making conversation. For them, it's not work at all." The trouble is that for most of the five years they've been together, Greg and Emily have been having one version or another of the same fight. Greg, a music promoter with a large circle of friends, wants to host dinner parties every Friday--casual, animated get-togethers with heaping bowls of pasta and flowing bottles of wine. He's been giving Friday-night dinners since he was a senior in college, and they've become a highlight of his week and a treasured piece of his identity. Emily has come to dread these weekly events. A hardworking staff attorney for an art museum and a very private person, the last thing she wants to do when she gets home from work is entertain. Her idea of a perfect start to the weekend is a quiet evening at the movies, just her and Greg. It seems an irreconcilable difference: Greg wants fifty-two dinner parties a year, Emily wants zero. Greg says that Emily should make more of an effort. He accuses her of being antisocial. "I am social," she says. "I love you, I love my family, I love my close friends. I just don't love dinner parties. People don't really relate at those parties--they just socialize. You're lucky because I devote all my energy to you. You spread yours around to everyone." But Emily soon backs off, partly because she hates fighting, but also because she doubts herself. Maybe I am antisocial, she"