Introduction Is the weather essential in building human relationships? As a child, I used to rejoice when going for a walk when the weather was rainy. But as I grew up, I started to prefer when the weather was ’nice’. How is it that the weather being ’nice’ means to be sunny in a deep blue sky for the majority of people. This mere personal experience had me wonder for years whether people liking a sunny weather better was due to social upbringing or whether humans naturally yearned for a walk under the green wood during a sunny afternoon in May with some friendly company.