Every single person has his own unique identity. So, the culture in which he is brought up has impact on one's entire life. ... People acquire the knowledge of language, costumes, food and social norms and values.
Answer:
Nobody knows they are doing bad things. They do what is most appealing to them. Not necessarily rational, but the person's primary interest. So, it depends on the person. "Bad" is completely subjective, so it depends on the situation and the parties involved. As a general rule, however, there are seven common reasons.
Hurt.
Fear.
Insecurity.
Inclusion.
Exclusion.
Guilt.
Shame.