It would help if you could explain which fact you do not find convincing, and I will attempt to provide sources that you can use for further research, if you ar

It would help if you could explain which fact you do not find convincing, and I will attempt to provide sources that you can use for further research, if you are interested to seriously examine the issue or have a serious discussion. A lot of original sources are cited by the Wikipedia articles. For example: "Sex differences in human neonatal social perception". > Abstract. Sexual dimorphism in sociability has been documented in humans. The present study aimed to ascertain whether the sexual dimorphism is a result of biological or socio-cultural differences between the two sexes. 102 human neonates, who by definition have not yet been influenced by social and cultural factors, were tested to see if there was a difference in looking time at a face (social object) and a mobile (physical-mechanical object). Results showed that the male infants showed a stronger interest in the physical-mechanical mobile while the female infants showed a stronger interest in the face. The results of this research clearly demonstrate that sex differences are in part biological in origin. http://www.math.kth.se/matstat/gru/godis/sex.pdf http://www.math.kth.se/matstat/gru/godis/sex.pdf