研究者表示，当条件看起来很有利时，男性有挑选与自己相似的配偶的自由，他们潜意识地认为与自己相似的配偶是将来培养他们后代的可依靠的伴侣。

When conditions seem favorable, the researchers suggest, men have the option of picking physically similar mates, whom they subconsciously deem dependable partners who will nurture their offspring.

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