The superego is the part in Freud's structural theory that develops last. It generally develops after one has solved ones oedipus complex, and has internalized his father figure and cultural standards. It floats both below and above consciousness. It's function is the part which holds the norms, ideals, conscience and taboo, and stands opposed to the animalistic impulses of the id.
Basically, when a boy starts eating with a fork and knife of his own device - not because anyone told him too - but because he thinks it's the proper way to behave - you can say he has started developing a superego.
Women, who in the original theory do not solve an Oedipus Complex and do not identify with the father figure (because they are already castrated) develop a much weaker superego, and so are prone to taste forbidden fruits in the garden...
The search for people who can answer your question continues for as long as needed - until you find the answer you were looking for.
When an answer is posted by someone who was invited (byYedda or by yourself) to answer your question, their answer is marked with a yellow "invited by Yedda".
To be invited to answer other people's questions in your areas of knowledge and interest, be sure to list your favorite topics:
» My Settings My Topics.
Of course, the more helpful your answers are, the more likely you are to be invited to future questions...