Six-years age disparity

Who knows who was the first one to claim this "very truth" but it was adopted by people at once and they still believe in it. When talking about differences in age of people, one always reminds about the perfect difference in the age and that difference is the difference in six years. Sure, when we say "they" we mean women, as men never count their years and the years of difference.
Though, women are not like the men, they are different, they are way different and so their minds are occupied with a number of question men will never think about. And one of those questions is about the difference in age of people who are in love. So, according to verdict the women court brought the perfect difference is the difference of six years.
They say that man has to be elder than women for sure and they also they that man has to be woman's senior for six years. That is a perfect couple (likelihood) and they will never have troubles with mutual understanding and no matter on any troubles they will always manage to temporize. Let them believe in what they want to believe, in case if that will make them happier.
There is also an opposition the women of another point of view created. They say, that man has to be woman's senior for 10 years at least. They are woman who want to have everything they want right here and right now. They don't want to wait and they don't want to work hard in order to get what they want. They believe that marriage is best and the shortest way to the life they want to have.