Same happens to me, talking about how names -proper names- are used in English speaking countries.
And something people in Spain do not understand... first: Why women "loose" their name when they get married?
And second: Why people in English speaking countries- or, at least, in US and UK, do only have one name. I mean, my complete name is Mar�a de los �ngeles Fern�ndez Ram�rez (Fernandez is my father's name and Ramirez my mother's name).
As you can see, every country/culture has their own peculiarities but, from my point of view, that's what make us all interesting!
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