Was sex discussed as much and as such a big issue back in the day as it is now in the evangelical culture?
I can't wait for the post-Christian cultural taboos to wear-off. The obsession is cumbersome. Of course, non-Christian cultures like Japan seem very deviant to me in certain respects, so it might just move into total gross-fest.
Contrary to the impression created by Japanese tentacle porn and local phallic festivals, the vast majority of Japanese have a strong sense of propriety about sex and many are even rather disinterested in it. While there is all manner of depravity available in Tokyo if you know where to look, there is zero sex in advertising and, where flesh is bared, it is usually reasonably restrained by Western standards.
The Japanese also do not have the bizarre hang ups of Americans when it comes to nakedness.
I think the Japanese do pretty well as a culture which has not had the revelation of Christ to assist in values-formation.