For most the men I know....
Sex is like air underwater.... It's not important until you're not getting any.
It is really to bad that people, in any country, get into a relationship and allow the bedroom situation to deteriorate, sometimes very quickly.
I understand all to well what happens when children enter the equation but feel it is temporary obstacle.
I also understand why many of my male aquaintances have stepped out of their marriages from time to time. When the communication (expressing feelings and desires) stops, the bedroom stops and the whole relationship begins to collapse.
I don't believe in ultimatums but at least they portend the path a person may be willing to take... Sleep with me or I will find someone else to do it for you. Some people may welcome that as long as they don't have to see it or hear about it.
That being said, a man, again a generalization of my observations, is predisposed to desireing variety, meaning multiple sexual partners. This is why we look at other women and wonder what they look like naked or what they are like in bed. I love my wife very much and would never step out on her but it doesn't stop me from wondering about other women.
I digress... This may explain a part of the older Japanese mens desire to go to the hostess bars... Although I belive more the idea that Jpanaese men my view their wife as a mother replacement.
A side thought... I really don't understand how the hostess bars stay in business. I don't think they would ever work here in America, that is with American men.
Go to a bar, pay a woman (actually the bar) to sit and talk to you, repeat the visit many times asking for the same girl, bring her gifts, and maybe you will get a number or offer to meet outside the establishment. I know I wouldn't have had the patience to put up with that... I was shocked to hear that we have hostess bars here in SoCal that cator to Japanese business men... Hmmm
I view the idea of the hostesss bar as a place for inept men to buy a relationship (not only/always sex). If they were looking for unattached sexual gratification why not find a prostitute or keep a paid girlfriend on the side? Realize that I am not condoning this, just accepting that it happens in real life... and yes women can do the same thing by going to a host bar or having a kept boyfriend on the side.