My two cents...

Interesting thread and interesting discussion

Re what the Koran says... well, one way of reading/interpreting passages of the Koran tells us that men cannot be trusted to behave themselves around women, that women should cover themselves in order to stay safe... men have no self control and the sight of womens skin can drive them past the edge of sanity. This interpretation has been verified for me by two Muslim males - however, they are only two of the thousands and thousands who follow this books teachings.

Regarding the Japanese man chastising the Japanese woman... well, Japan is actually highly prudish about sexuality in public (despite western perceptions of there fetishes with school girl uniforms etc).
My understanding is that Japanese law will not allow any displays of sexual intimacy in public unless they are between married couples. Hence, the only sexual scenes in movies with real people are between married couples. Hence the high popularity of manga and anime where the girls and women are cartoons and therefore ok to be involved in sexual acts with caricature males, or aliens/weird non-human creatures.

I am happy to be critiqued on this... this is only my perspective from what I have heard and seen and read on a very limited scale and from a western viewpoint and understanding.