Biological bases of sexual deeds

Biological bases of sexual deeds are cells of bottom - hill part, the part with some cm2 wide in brain but it has an important role in adjusting and controlling instinctive reactions such as eat and sex. That part appeared in many low - level creatures and developed earlier than other brain's parts that controlled complexly mental processes of humans such as memory and language. Bottom - hill part with parts that control concentration of testosterone - hormone make stimulations and sexual deeds. Sexual deeds of both creatures and human are related with concentration of hormone testosterone. With both male and female, concentration of hormone testosterone affects sexual desires and deeds. However, different from animals, there is not absolute connection between concentration of hormone and sexual deeds because of interference of senses. Other chemical discovered to be associated with sexual deeds are conductive mental substances having mission in ensuring contacts of brain cells. Michael Liebowitz, a psychiatrist , is one of people having researches in chemical nerves in love and sex. He found that there are some people plunging into love easily despite of unsuitability. However they will be dull easily, change lovers as clothes. He thought that such people may have less phenylethylamine (PEA) - a brain chemical having structure like amphetamine, affect cheery and enthusiastic emotions. Longly lacking that chemical, people will find "happiness" in romantic meetings and sexes. Michael Liebowitz make those people to use kind of medicine inhibiting monoamine oxidize enzyme (IMAO) - one kind of anti depression medicine effecting concentration of phenylethylamine and many conductive mental substances such as dopamine, serotonin and norepinephrine. After treating, many patients had no womanization, did not find love at any cost. Maybe they no longer felt that loneliness was a heavy state or they became more self - confident, careful in choosing lovers. They did not need enthusiasm like whenever they plunged into loves - state happening like whenever using amphetamine.

Besides phenylethylamine, new discoveries found out that 2 other hormones, ocytocine and vasopressine, had also important parts in sex and love. Concentration of those hormones in blood increased in both male and female when they were enthusiastic with sex and when men ejaculate . Excretion ocytocine maybe had an important part in development of emotional relations, encouraging joining into lovers. Larry Young with her partners in Behavioral science and psychiatry , Emory University discovered that ocytocine, one of many nervous chemicals, had function in adjusting social behaviors having attribute of one wife - one husband regime, in which male and female joined into lovers and fathers brought up their children.

Helen Fischer, female researcher, freelance of anthropology faculty, Rutgers University affirmed that nervous chemical system in human brain progressed with encouraging male, female attraction and copulation to help couple maintain necessary time for reproduction and bringing up their children.

Difference of sexual deeds between humans and animals

As stated above, there is not absolute connection between concentration of hormone and sexual deeds because of interference of senses. Development of senses (biological basis is cerebral cortex ) makes sexual deeds of humans to grow with 3 positive directions, quite different from animals:

Eliminate and criticize: Limit metaphysical properties, criticize negation of female roles in sex life, and can choose lovers with nice standard (besides physical appearance , there is intelligence, morality, spirit). Not search for sex satisfaction at any cost. That property is the basis of faithfulness of wife and husband, prevention of AIDS and other depraved snares.

Develop, rear sex functions: Make imagination rich by cultural products, create good conditions for sexual reactions, and make sex leave effects of senses (no physiological operation is as sensitive to cerebral cortex as sex physiology.)

Purify and improve: Considering sexual deeds as humbleness is incorrect, heighten sex lives of individual (make sexual deeds more meaningful and secure by invention of contraceptive methods, help people own harshly physiological rule about reproduction), care about factors that make lives copious and multiform.

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