Culture is shared: Culture in the sociological sense, is something shared. The art and history that we are proud of, the literature we learn from, our education, and our upbringing shapes our personalities. These beliefs and practices are adopted by all equally.
They are viewed in their society differently. This affects what they teach their children, thus influencing the culture of their future generations and in a small way, leading to a cultural change. An example of this is the influence of American and European cultures on other countries.
Unlearned behaviour, such as closing the eyes while sleeping, the eye blinking reflex and so on, are purely physiological and not cultural.
Their roles in the family and society are defined by their culture. Some aspects are not correctly or completely understood while some are not accepted.