In a recent paper1, Alden and Mullens reported the results of a survey of terminated human sexual relationships, which indicated that sexual desire (referred to by the authors as "romantic love") decreases exponentially after inception, typically decaying to a nonmeasurable level in 6 to 18 months. The researchers advanced the hypothesis that "romantic love seems to have a half life, much like radioactive decay."
[quoteright'/>The present research2 supports that hypothesis, and further extends it by suggesting an exact quantification for the decay process. It shows that
T=G- sqrt 2 over 2 [a'/>
where T is the half-life of sexual desire for the species under study and G is the same species' natural gestation period. In H. Sapiens G is 273 days; therefore T is 193 days and 58 minutes. In the laboratory, this is called the Lust Extinction Factor. The right hand expression in formula (a) is derived from standard theories of exponential change in dynamic systems3. Regression analysis shows that formula (a) exhibits a chi-square test fit to Alden and Mullins' empirical data to a 0.96 confidence factor, well within standard limits for theoretical validity4.
The role of G in formula (a) is of interest. The present research suggests that this is a constant deeply embedded in the evolution of social animals. Referring again to H. Sapiens in the prototypical mating pair (before adculturation) sexual desire commonly results in fertilization, followed after the period G by parturition. The breeding population maximizes its survival rate by evolving responses such that the female transfers her attentions from the impregnating male to the neonate during this process. To adapt to this transfer, breeding males evolve a simple Wallenden-Kirchstein decay curve in their sexual behavior, as expressed in formula (a).
In conclusion, the foregoing theory is offered as an explanation for frequently expressed, but hitherto unanalyzed, observations such as, "the honeymoon is over," "after a few weeks they're all the same," and "you don't love me any more." Research is continuing in an effort to elicit the exact dynamics of the lust-to-boredom transition.
1. Alden, J., and Mullens, P., "The Goodbye Syndrome: Terminated Human Relationships," in Sexual Abstracts 135:12-20 (Oct. 1977).
Andy Fish, our staff mascot, and others in his school is the name used when authors (usually one G. Towner) wish to cloak their identity as the writer of certain inappropriate fish stories. All of Andy's aliases are listed under Andy's name. Otherwise we'd run out of room in the Contributors list!
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