10. Ideas about the relationship of the level of sexual desire to the rate of sexual activity

We assume that there exists a "basic," genetically determined level of sexual desire, and that this level can change under the influence of personal factors, sexual partners, and the micro- and macro-social environment. The various levels of a subject's sexual activity can therefore be classified as belonging to one of three states.

In the first state the rate of sexual activity corresponds to the level of libido, in the second case it is higher, and in the third it is lower.

Continuing the theme, let's take the example of a man whose basic level of libido is classified as 'low,' but who is driven by personal factors towards an intense rhythm of sexual life - a result of his acceptance of the social stereotype that in the first year of marriage sexual intercourse should be "frequent".

As a result of this man's high rate of sexual activity, the cyto-genetic mechanism of pre-zygotic determination produces an elevated level of testosterone, and the pool of Y-carrying spermatozoids have a selective advantage, which is realized in the process of pre-zygotic selection, leading to the conception of a male child.

There are some families where the genealogical tree along the male line shows only men (and vice versa) for several generations. >>>

It is possible that in these cases, the limited level of sexual desire is inherited, as are the specific personal factors which lead to "frequent" sexual activity.

We will now examine the second case - where the man has a 'low' or 'moderate' level of libido, but the personal factors are situation-dependant, and not genetically determined. The man's partner has a strong sexual drive, and the couple's sexual life reflects this. The man again produces high levels of testosterone, leading again, through the familiar process, to the conception of a male child.

In this case, the subject's genealogical tree does not have the characteristics described above. In the next example, the genetically determined level of libido is 'high,' but personal and social factors (for example, a religious world-view) limit the level of sexual activity.

As a result the cyto-genetic mechanism produces less testosterone, and the X-carrying pool of sperm gains a selective advantage, which is realized in the process of pre-zygotic selection, leading to the conception of a female child.

We will not continue to enumerate all the possible variants, but note merely that, even though the factors influencing the basic level of libido and the rate of sexual activity are extremely numerous and varied (these factors include the influence of the sexual partner, somatic condition, marital status, social conditions, and so on), the modulations of the cyto-genetic mechanisms of pre-zygotic determination lie within certain clear boundaries.

Yours faithfully,

Dr. Yuriy Zharkov

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