Summary

Corpus cavernosum female

Wonder it may be, the female sexual organs have never been related to intelligence, cognition and consciousness in the evolution of humans. This is striking in many ways. Within evolutionary biology it is common to observe differences in genetic and anatomical properties of two species who have derived from a common ancestor. Though humans and anthropoid apes differ in many properties, one of the most prominent discrepancies is the anatomy of female sex organs.

It is generally accepted that Homo (humans) and Pan (chimpanzees) have originated from the same common ancestor approximately 5 to 6 million years ago. Female chimpanzees nowadays have an external corpus cavernosum which turns red when the female is in oestrus. Female human sexual characteristics are completely different. Their internal corpus cavernosum and the external clitoris are much overlooked and often even absent in anatomical or medical pictures.

According to the ‘laws of evolution’ these distinguishing anatomical features in (current) female humans and female chimpanzees must have evolved through natural or sexual selection under the influence of a selection pressure. The omission of examining female sexual organs within evolutionary biological discourses is furthermore problematic, because sex, reproduction and childbirth are critical in any evolution. Sexual organs and gender-specific chromosomes tend to evolve much faster than other organs/chromosomes.

The Sexual and Social Intelligence Hypothesis states that because of differences in female sexual organs two behaviour patterns occurred. One is called straight forward penetration. The other one is called ‘making love’. Making love requires sexual, social and neurocognitive skills like sexual empathy, being able to perform target actions on another body, being altruistic and delivering the sexual partner an orgasm. And last but no least making love demands learning behaviour and differentiation because all sex partners desire different actions that lead to individual orgasms. Making love has led to typical neurological properties and skills in humans.

The Sexual and Social Intelligence Hypothesis adds to:

- The General Intelligence Hypothesis; by explaining how advanced learning and increased intelligence have arisen -inside out- from the sexual behaviour pattern making love.

- The Social and Cultural Intelligence Hypothesis; by equating social and sexual behaviour. Sex is accepted vehicle for evolution, but making love in humans has evolved into a complex and complicated social ‘problem’ which could only be resolved by developing communication, psychological and cognitive skills in humans.

Within the evolutionary biological paradigm the Sexual and Social Intelligence Hypothesis concludes that human evolution can be explained within the sexual selection axiom. The hypothesis appoints female orgasm as selection pressure under which female sex organs and female sex chromosomes have mutated. The hypothesis introduces a biosemiotic explanation framework for human evolution. Biosemiotici differentiate between vertical and horizontal evolutionary processes and introduce a species specific semiosphere in which organisms interpret important and relevant -sexual- signals in the Umwelt. The Sexual and Social Intelligence Hypothesis recommends further multidisciplinary (empirical) research on differences in X/Y chromosomes, on differences in sexual behaviour and on differences in neural and cognitive representation of sexual partners in the neocortex of Pan and Homo.