Is having an open relationship more acceptable in American society when compared to other cultures?

When I speak of my open marriage to people in my Russian community, they marvel at my words and say things like ‘such things would never fly with a Russian man’ implying that either he, as a Russian man, is more controlling or more religious (depending on whatever assumption the people in question want to make)...yet I counter that America is quite religious, as well…I know we’ve got many cultures on fluther…think to yours…would open relationships be more acceptable in the society of your roots when compared to the US?

Obviously we run into problems in terms of who represents an American culture and whether such exists…all that aside, think of the place where you live and compare other countries to that place…