老牛吃嫩草 lăo niú chī nèn căo
Whoever strolls in a major city’s hip locations at night will notice the number of May-December couples, i.e., pairs where one mate (usually the male) is significantly older than the other. This proverb fiddles with this phenomenon and is based on the observation that older men seek younger women (as wives, but also as mistresses, girlfriends, one-night stands, etc.), and that older women sometimes like to date younger men (most probably as toy boys only) – if, of course, the financial situation and physical attractiveness of each partner respectively, allow for such a match. Yet this apposition is not highlighted for any reason. As shall be seen in the following, economical or material considerations indeed often play a major role in such relationships.
According to statistics available for Europe, most men marry women who are about three years younger than them on average. This fact can easily be explained by biological and social considerations: From a survival perspective, it makes sense for women to choose a better half that can protect them and their offspring. Given that people’s wealth normally increases with age, an old man is likely to have a higher status, greater resources, a larger network, and therefore a better ability to provide for her. The reason why the age difference is not much higher than three years is equally perspicuous: If a man is too old, he is expected to die earlier, meaning that his (or the couple’s common) resources will dry out or will be reduced in the wake of the inheritance division. In this regard, the genuine love story between Anna Nicole Smith and J. Howard Marshall, an oil business mogul 62 years her senior, should certainly be remembered as a historical exception.
Furthermore, mature men display comparatively lower testosterone level, which makes them more stable emotionally, more reliable, and thus more credible with regard to long-term commitment. They are also recognised as being more generous in bed, more under control of their own desires, and more understanding, respectively knowledgeable about what women want – all qualities that should not be underestimated when it comes to (short and long term) heterosexual relationships. On a similar note, studies show that the sex drive of a man in his forties, for example, is more compatible with a woman in her early twenties (that is, in terms of interest and need, not physical performance).
Likewise, the existence of “cougars” (a slang term referring to a women who date and sleep with much younger men) can be justified with analogous arguments: While human males’ libido peaks at age 19, the sexual functioning of females tends to reach its highest point when they are around 36 to 38., Hence, from a purely biological and lust-technical standpoint, it is apparently this combination, a Mrs. Robinson in her late thirties with a 19-year-old Benjamin Braddock, that promises the most action in bedrooms worldwide. This has not only to do with the fact that only younger men have the appetite, potency and the physical ability an older woman yearn for. Other aspects, such as hormonal changes within a woman’s system, life experience, self-confidence, comfort with one’s own body, play an equally crucial role in explaining such unions that make no sense from an evolutionary perspective, as women have virtually lost their reproductive value at that age. Other than true romance or momentary lecherousness, the only plausible reasons a stripling would go for this kind of arrangement are power, connections, reputation, celebrity, or money. That being said, the key insight here is not that “coupling between an older woman and a younger man can’t last”, but as Alan and Barbara Pease point out in their 2009 book Why Men Want Sex and Women Need Love: “[S]ome do – but most don’t.”
 A deeper discussion about the importance of age in mate selection is held in chapter 14 “Fair lady is what gentleman seeks”.
 Cited in: Wardrop (2009)
 Pease / Pease (1999), p. 222
 Pines (2005), p. 101
 Pease / Pease (2009), p. 62