Don Tillman, professor of genetics, has never been on a second date. He is a man who can count all his friends on the fingers of one hand, whose lifelong difficulty with social rituals has convinced him that he is simply not wired for romance. So when an acquaintance informs him that he would make a "wonderful" husband, his first reaction is shock. Yet he must concede to the statistical probability that there is someone for everyone, and he embarks...