This could be viewed as the second installment to that series, though technically, this one is for men and women:
The Case for Letting Your Partner's Eye Wander
"Just ask Eve. There's nothing so desirable as the one thing you're not allowed to have. Which is why a new study suggests that if your partner's got a wandering eye, you might be better off letting him (or her) enjoy it.
Research on romance has consistently shown that men and women who don't notice attractive strangers tend to be more satisfied in their own relationships and are more likely to stay with their partners long term. Of course, that blindness has to come naturally. When a person is forced to divert his attention from that cute bartender — by, say, a jealous partner's opprobrium — it could result in a sort of "backlash" effect, which may end up reducing his level of relationship commitment..." source).
Marriage and jealousy is such a tricky subject... Too jealous is obviously bad and can kill a relationship quickly, but not jealous at all can be a warning sign too.
My small piece of advice gleaned from 14 years of marriage? There's enough to worry about with all the "real threats" out there and you girls (and you know who you are) that actually get mad wen your man has celebrity or Victoria's Secret crushes...really? You think even if he met Carmen Electra, she would want your broke ass man? Let him have the fantasy --what can it hurt? And the reverse is true for you men who don't allow your women to express these harmless crushes...who cares if she thinks Beckham is hot? That doesn't diminish her feelings for you. There is enough to navigate out there without creating these meaningless fights and jealousies...