First of all, Japan's traditional culture on the male society, advocating strength, so as the most fundamental symbol of male, many places worship male brother. In addition, Japan's history is relatively short, there is no cultural heritage, and is an island country, the population is small, so there is less of a hundred cultures like China's period, equal to a hundred cultures from the primitive people directly over the same, and then the introduction of our culture is a little bit better, but its own barbaric culture, such as Bushido and so on is also inherited, after all, only this is the only point of belonging to their own things, can not be denied cleanly, lose the self is not it, so the primitive power of the Japanese culture is not the same as the original. The self is not it, so the primitive power and sexual culture is the Japanese people think of their own things, they do not exclude these, because it is a male society, then the accumulation of men's sexual desire is also belongs to a man's a kind of trouble, for men to solve this kind of trouble for the women then is supposed to exist, that belongs to the duties of women. That's why Japanese people think that women's sexual service is fine, and it's their job, so it's the same with pornography, which is considered to be a kind of work without serving others. And it's seen as normal behavior. So women are just as casual about sex.