People don't mean any harm, and yes, it's just a fact of life if you move to another country, but at the same time, it does get old.
It's not always a good time to be asked these questions that others dont' get asked, or to have to take time to handle them, even in the quickest simplest way.
The questions don't always come at a moment when it's okay and one is happy to share.
And I agree with the person who said people are not entitled to have their curiosity satisfied.
We all know these people mean no harm and it's just human, friendly curiosity. But there really are times when one wants to scream. I got this for twenty years in the US, as a Brit over there, same issue but in reverse. I did find it extraordinarily intrusive in about 80% of the settings or situations in which it would take place. There are times, situations and social settings in which you kind of have to accept that it's okay and then you're happy to answer the questions and enjoy the friendly curiosity.
But there are other times, situations and social settings in which it's very, very old, especially after YEARS and the ten thousandth time you've been through this same conversation.
I completely relate to those who are tired of it. It can be exhausting, especially for those who work with a constant stream of interface with the general public. I gave up jobs like that just to cut some this stuff down in my daily life. I also wound up either mumbling very few words in shops or to wait staff, or "allowing" the natural "American" sounds that had developed in my speech to take over enough for the odd sentence to sound like a native. Only because I might be tired, had a horrible day, did not want to get into it. Those are legitimate needs.