How does the code of chivalry affect sir gawain in sir gawain and the green knight?

Sir Gawaini one of the knights of King Arthur's Round Table. Once, he accepts a challenge from the  "Green Knight".

Explanation:

As a Sir Gawaian is a knight, he must follow and obey some rules of chivalry, one of the rules is to respect his host, but also to obey and do anything a laidy asks. Sir Gawaian is in the middle of this situation, he must decide if honour his host or do what the damsel wants. Finally, he decides to fail to his host but to honour the lady. Now, and as a consequence of his decision he is not virtuous anymore and he lost his honour.

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