I enjoyed reading the article, however I feel that the authors simply reinforce what society and our culture tell us we should find attractive. Good looks, wealth, security, muscles, nice cars and great jobs draw people in, but it is fantasy, and not simply sex, that people are truly looking for. People can have lots of sex, but never fulfill their fantasies. Statistically, this is why most married men seek out prostitutes...it is not because they do not love their wives. If you can fulfill your partner's fantasy, then all these superficial factors matter very little. Now it is true that your ability to fulfill your partner's fantasy does not always keep them from straying, however you will always be the one that got away and consciously your former partner will often not understand why. Unfortunately we too often rely on the superficial because we are embarrassed by our fantasies and/or do not know how to recognize them in our partners.