I recently saw someone try to support the idea of “test driving” a potential marriage partner prior to getting married in order to ensure that they are “sexually compatible”, and then in the ensuing discussion I was told to look up the research on “the wide variability in female sexual responsiveness due to both psychological and anatomical reasons”. My understanding is that what research in this “field” exists doesn’t support the importance of “test driving” a potential marriage partner, but that’s irrelevant because there simply can’t be any good science on this subject. We can tell that by the simple expedient of asking what kinds of experiments could get us the data we want, and discovering that it’s not possible to do them.

So, what kind of experiment would show us that “there’s a wide variability in female sexual responsiveness due to both psychological and anatomical reasons”? Clearly, we’ll need to have a large number of females copulate with a wide variety of partners and measure their responsiveness during each copulation, then compare the things to which each female maximally responded to in order to see how big the range is. You can’t leave off any of these things; if you only study a few women, you won’t have the statistical power to conclude anything. If you leave off the wide variety of partners, then you can’t differentiate between there being a wide variety in what women respond to versus there simply being a wide variety in the degree to which women respond at all. If you leave off measuring, instead relying on surveys, you can’t differentiate between there being a wide variety in what women respond to and there being a wide variety in how women describe their response.

This experiment is both impractical and impossible; let’s discuss the impracticality of it first. One obvious problem is recruitment: there are very few people willing to copulate with a large number of strangers in a laboratory, covered in probes to measure responsiveness, and observed by experts, on command. Also, since you will have to pay the participants and this amounts to prostitution, there are relatively few places you can legally conduct this experiment, especially since bringing in the variety of women you want may well count as sex trafficking, doubly so because of the use of blindfolds to eliminate attractiveness as a confounding factor when measuring the effect of physical variations of anatomy. Moreover, getting this approved by an IRB (ethics committee) is pretty dicey. Never say never, of course.

But supposing one were to manage to work all of these practicalities out and conduct the experiment, it would not produce any data relevant to real life because people’s enjoyment and satisfaction in copulation is largely determined by their relationship to the person with whom they are copulating. Married people frequently report greater enjoyment of sex after five or ten years of marriage than right at the beginning, and it is impossible to have your experimental subjects form real relationships for years to each of the many subjects with whom they will be paired. If nothing else human beings don’t live that long, but repeated pair bonding is also well known to weaken subsequent bonds, especially without time between them. Plus people don’t form real bonds on command.

It is thus impossible, even in theory, to scientifically study the kinds of things which might support the idiotic idea of “test driving” a potential spouse. And bad science is worse than no science.

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I should probably mention that the idea of test driving a spouse, in addition to being immoral, is also idiotic because it’s predicated on two premises, both of which are false:

1. people can’t learn
2. people don’t change

Young people are told to not pay too much attention to the looks of a potential husband or wife because looks are only skin deep and virtue, character, and personality matter far more. This is all quite true, but it’s also the case that selecting a husband or wife based on their looks is futile anyway because their looks will change as they age. You can find this with any celebrity who is in their sixties—just look at pictures of them from the various decades and while they are recognizable, they will be quite different. And celebrities tend to be selected for being people who change the least as they age.

In the same way, people’s tastes and preferences change. Women’s bodies change after pregnancy and childbirth. Quite apart from the immorality of the thing, the idea that finding who people who happen to match each other in their sexual enjoyments will be conducive to lasting happiness is simply unrelated to reality. Everyone must learn and adapt. There are no exceptions to that in this world.