I noticed a few of these things myself in Japanese movies, mainstream and porn, but you have a much better understanding. Basically a lot of what we are doing here is pushing the envelope on the taboos of our society, and taboos are very much related to culture.

As far as I understand kissing can be shocking for Indians, a naked face as significant as a naked body to some Arabs and while if you are looking for an escort Thailand is a much better place than here the number of options except gender that you have is much reduced.