I think we must have uncomfortable or worried if we want to live in society, or the environment in which we are not familiar. Therefore, it is easier if the couple is closest.
I think we have to be uncomfortable or worrying if we have to live in a society or environment in which we are unfamiliar. So it's easier if couples are similar.
I think people will be uncomfortable or worried if we want to live in a society or the environment we are familiar. So it's easier than if a couple are similar