Why do most people associate the coming of spring with the awakening of the senses, with an invincible desire for life and love? It is well known empirically that the rise in temperature and the gradual increase in the length of the day during the spring Black London Mistress and summer months affect the whole of nature. Less understandable is how this periodic seasonal change affects people’s sexual and psychological moods.

Is there an ideal time for humans to have sex, as is the case with most mammals?

As they discovered relatively recently, in the course of the evolution of higher mammals, two specialized brain circuits were gradually formed that jointly regulate the erotic behavior of animals.

The chronobiological rhythms of sex

The first neural circuit is able to recognize and prepare the body for the coming of warmer times.

The second neural circuit allows the body to estimate the energy costs and energy reserves required for intercourse and reproduction.

These two neural circuits were located in an archaic structure of the brain, the hypothalamus. It is a brain structure crucial for the homeostatic balance of the body: it receives all external information from the environment and contrasts it with the internal parameters of the body, thus regulating its endocrine and visceral reactions.

The hypothalamus therefore controls survival and guarantees the balanced development of the organism, determining when or how much it should be fed, but also when or how often it should have intercourse.

As erotic literature has long felt and described, diet and sex are two closely intertwined biological functions!

The “entanglement” of food-sex was scientifically confirmed by the studies of professors R. Foster and T. Roenneberg. Four years ago, two researchers in chronobiological brain mechanisms showed that the activity of these two hypothalamic circuits decisively affects the activation or deactivation of sex-related brain structures and fertility. In other words, these brain circuits determine the reproductive rhythms of different mammals (annual, seasonal or perennial).

So we begin to understand why and especially how the length of the day (photoperiod) determines the erotic behavior of higher mammals. Indeed, most mammals have special brain circuits to recognize the increase in day length in summer, which in turn creates the necessary conditions for a successful and fertile intercourse.

The reasonable question is whether they or even some similar brain mechanisms regulate human erotic behavior. In fact, in more difficult social conditions, the increased erotic activity of our ancestors in the summer (eg in July or August) was the guarantee that the waves that would be born after nine months would come into the world in the spring, which ensured their greater viability

However, according to official demographic and statistical data, people’s sexual activity increases significantly during the summer. For example, several studies in the US and Europe confirm that condom sales are rising sharply during the summer months. However, this fact could well be explained not in biological but in sociological terms (holidays, more free time, etc.).

Therefore, our increased sexual activity in the summer can possibly be explained biologically, if of course we consider it as a remnant of our evolutionary past.

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