"I did not mean cutting the relations between men & women.
We do not need to separate men & women like that.

A man can marry a woman.
A woman can have male children.
A man can have female children.
A woman can have a male parent.
A man can have a female parent.
A man can have female grandparents.
A woman can have male grandparents.
A man can have aunts (mother's sisters & father's sisters)
A woman can have uncles (father's brothers & mother's brothers)
etc.

In a Muslim country what you do not need to have is......."

What about a woman can have a man for a boss
or a man can have a woman as a boss,
or a woman can have a man as a teacher
or a man can have a woman as a teacher
Or a man can have a woman as a friend
or a woman can have a man as a friend

There are many many ways the men and women can interact that do not mean sex. And if the relationship between a man and a woman is a sexual one, who are you to judge? Just because you aren't having sex doesn't mean you have the right to stop other people.