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The author stated that these results appear to support the assertion that differentiation of desire over the course of a relationship is explained by different evolutionary motivations between the sexes. Men have a motivation to maintain a high level of sexual desire to ensure regular [[copulation|copulations]] to guard against cuckoldry by potential rivals and maximize reproduction. Whereas, in women the primary motivator when it comes to relationships desire to create and maintain a pair-bond with the male, to ensure his continued investment in her and her offspring. | The author stated that these results appear to support the assertion that differentiation of desire over the course of a relationship is explained by different evolutionary motivations between the sexes. Men have a motivation to maintain a high level of sexual desire to ensure regular [[copulation|copulations]] to guard against cuckoldry by potential rivals and maximize reproduction. Whereas, in women the primary motivator when it comes to relationships desire to create and maintain a pair-bond with the male, to ensure his continued investment in her and her offspring. | ||
Contrary to common assumption the result suggests that, on average, high degree of familiarity is detrimental to relationship stability because the woman gets bored. | |||
The results of this study were replicated by two longitudinal studies performed by McNulty et.al (2019). They found that controlling for the effects of childbirth, post-natal depression and stress, the length of the marriage was still a predictor of lower female [[libido]], but not male libido, which remained constant. | The results of this study were replicated by two longitudinal studies performed by McNulty et.al (2019). They found that controlling for the effects of childbirth, post-natal depression and stress, the length of the marriage was still a predictor of lower female [[libido]], but not male libido, which remained constant. |