What is the origin of the idiom "do one's own thing" and when to use it?

The idiom "do one's own thing" became popular during the 1960s and 1970s when people were embracing individualism, personal freedom, and self-expression. It was a time when people valued being unique and expressing themselves freely. It is used to describe the act of pursuing one's interests, preferences, or passions independent of external influences or societal expectations. It implies a sense of autonomy, self-determination, and nonconformity.