8. Variations in the rhythm of sexual activity

We must turn our attention to the condition of the human organism at various levels of sexual activity. It has been established that with frequent ejaculations, several of a man's sperm indexes change.The fertilizing abilities of the sperm are not, however, reduced.

Some well known studies have shown that the incidence of infertility in prostitutes is linked to high levels of spermicidal anti-bodies in their blood serum.

9. The importance of the frequency of male ejaculation

It is well known that periods of sexual abstinence encourage the conception of female children, and that frequent sexual activity leads to the conception of more males. To quantify the categories of 'frequent' and 'infrequent' we use the theory of sexual constitution. We understand sexual constitution as the aggregate of stable biological mechanisms, arranged under the influence of hereditary factors, and conditioned during the pre-natal period and in early stages of ontogenesis. Sexual constitution fixes the individual sex-drive at a certain level, and determines a subject's resistance to pathogenic factors which have a selective role in the sexual sphere.

Using the algorithm for determining sexual constitution (by G.Vassiltchenko), we can calculate the genotype index (Kg), the index of sexual activity (Ka), and also their ratio (Ka/Kg). The ratio of the two indexes allows us to quantify the rhythm of ejaculation as shown below:

1. Ka/Kg between 0.90 - 1.09 is evaluated as an "optimal" rate of sexual activity.

2. Ka/Kg higher than is evaluated as "over-active" sexual life.

3. Ka/Kg lower than 0.89 is evaluated as "relative abstinence".

The use of the algorithm of sexual constitution, then, helps to evaluate and to classify the rate of sexual activity. In general, the rhythm of sexual life is a product of libido, and it is worthwhile to examine the causes of variations in the level of sexual activity.