I have a question for members of this board that I've been pontificating for awhile. Why are Scandinavians, and Northern Germans notorious for being more reserved, while fellow Southern Europeans are known for being more gregarious? Empirically, I noticed this trend when I traveled in Europe on several occasions. I also happen to have relatives in Sweden and Norway, which my family keeps in contact with. Moreover, I had a German exchange student who was very aloof. When I was over in Italy and Spain, normal Italians and Spanish were not afraid to strike up a conversation, some of them didn't even know English all that well, but they made an effort. Also, when I was in Italy, I was engaged in a rather lengthy discussion with some Portuguese. During my conversation, I broached this very same topic with them, in which they seemed to think it had to do with the weather. They thought that people in colder climates were generally more reserved, while people in more temperate climates are more outgoing because it's always sunny. Anyways my question for you is, do you think it boils down to the climate or genetics?