* Records of legislation indicating either encouragement or prohibition
* Religious and philosophical texts recommending, condemning or debating the topic
* Literary sources, perhaps unpublished during their authors' lifetimes, including diaries and personal correspondence
* Medical textbooks treating various forms as a pathological condition
* Linguistic developments, particularly in slang.
* More recently, studies of sexuality
Reproduction and cultural gender roles
It appears that even in early historical times, it was not clear that there was any male role in reproduction - there is no immediate correlation between sex and reproduction due to the delay in the obvious signs of pregnancy. However, all civilizations hit upon the concept of male reproduction and, even more importantly, paternity, most likely from the correlation seen during the development of animal husbandry. The discovery of paternity led to concepts such as fathership of children, the importance of ensuring fidelity, the role of marriage as prima facie proof of paternity, and holding individual males responsible for the support of their offspring.
Another school of thought (e.g. Jared Diamond in Why is Sex Fun? The Evolution of Human Sexuality) holds that the reasons behind the development of these concepts is biological, a result of a variety of unique elements of human sexuality (Sex for pleasure, hidden ovulation, etc.). Natural selection ensures that men that are able to be more certain of the parentage of the children they care for will be more likely to pass on their genes.
This division has shaped many of the gender roles that survive to modern times. As humans have gained increased mastery of the environment, these divisions become less and less relevant, but change, while it is taking place, happens gradually.
n what is perhaps the very earliest novel in the world, the Genji Monogatari (Tale of Genji), which dates back to around the eighth century AD, eroticism is treated as a central part of the aesthetic life of members of the nobility. The sexual interactions of Prince Genji, the central figure in this extremely long story, are described in great detail, in an objective tone of voice, and in a way that indicates that sexuality was as much a valued aesthetic component of cultured life as would be music or any other of the arts. While most of his erotic interactions involve women, there is one telling episode in which Genji travels a fairly long distance to visit one of the women with whom he occasionally consorts but finds her away from home for an extended period. It being late, and intercourse already being on the menu of the day, Genji takes pleasure in the availability of the lady's younger brother who, he reports, is equally satisfactory as an erotic partner.
From that time down at least as far as the Meiji Reformation, there is no indication that sexuality is treated in a pejorative way. While homosexuality was driven out of sight for some time, it seems to have continued unabated for it reemerged in the wake of the sexual revolution in the West with seemingly little if any need for a period of acceleration. Likewise, prostitution was practiced more discreetly but did not disappear.
In Japan, sexuality was governed by many of the same social forces that make the culture of Japan considerably different from the culture of Western nations, and also different from the culture of China. In Japanese society, the primary method used to secure social control is the threat (and, occasionally, the actuality) of ostracism. Japanese society is a shame society.[citation needed] Therefore, more attention is paid to what is appropriate to expose to the view of other people than is paid to what behaviors would make a person "guilty." Also important is the strong tendency of people in Japanese society to group in terms of "in group" individuals and "out group" individuals. What may be open to knowledge by one's in group may be different from what is open to knowledge by one's out group, and, what may be avoided because of pressure by one's in group may be of little or no consequence in one's relationships to one's out group.
A frequent locus of misconceptions in regard to Japanese sexuality is the institution of the geisha. Rather than being a prostitute, a geisha was a woman trained in arts such as music and cultured conversation, and who was available for non-sexual interactions with her male clientele. These women differed from the wives that their patrons probably had at home because, except for the geisha, women were ordinarily not expected to be prepared for anything other than the fulfillment of household duties. This limitation imposed by the normal social role of the majority of women in traditional society produced a diminution in the pursuits that those women could enjoy, but also a limitation in the ways that a man could enjoy the company of his wife. The geisha fulfilled the non-sexual social roles that ordinary women were prevented from fulfilling, and for this service they were well paid. That being said, the geisha were not deprived of opportunities to express themselves sexually and in other erotic ways. A geisha might have a patron with whom she enjoyed sexual intimacy, but this sexual role was not part of her role or responsibility as a geisha.
As a superficial level, in traditional Japanese society women were expected to be highly subservient to men and especially to their husbands. So, in a socionormal description of their roles, they were little more than housekeepers and faithful sexual partners to their husbands. Their husbands, on the other hand, might consort sexually with whomever they chose outside of the family, and a major part of male social behavior involves after-work forays to places of entertainment in the company of male cohorts from the workplace -- places that might easily offer possibilities of sexual satisfaction outside the family. In the postwar period this side of Japanese society has seen some liberalization in regard to the norms imposed on women as well as an expansion of the de facto powers of women in the family and in the community that existed unacknowledged in traditional society.
In the years since people first became aware of the AIDS epidemic, Japan has not suffered the high rates of disease and death that characterize, for example, some nations in Africa, some nations in Southeast Asia, etc. In 1992, the government of Japan justified its continued refusal to allow oral contraceptives to be distributed in Japan on the fear that it would lead to reduced condom use, and thus increase transmission of AIDS.[1] As of 2004, condoms accounted for 80% of birth control use in Japan, and this may explain Japan's comparably lower rates of AID





















