@Levy: don't play with words! In your nationality, for instance, do all people believe and behave same way?
Did i said that?
Actually, did you read the part where i said: "And doesn't mean that all Portugueses or Poles are the same among them, but means that there is a probability of find some kinds of behaviour X, Y or Z within a group much higher than outside this same group."
Do you know what means the word probability, right?
Thus, you cannot say German husbands are this way and Greek wives are that wa
No (and i didnt said that you can, just in case your lack of interpretation skills didn't let you realize that)
But you have patterns that have higher probability of appear in certain groups than others.
Example: The chance that find a unpunctual brazilian is way more higher than the chance of find an unpunctual swiss. That doesn't mean that all swiss are punctuals. But we are talking about big numbers, not singular cases.
Same applies to an infinite number of characteristics.
And, among those characteristics, is the approachability of a person.