Why Does Bluebeard Kill His Wives?

It is not explained why Bluebeard murdered his first bride; she could not have entered the forbidden room and found a dead wife. Some scholars have theorized that he was testing his wife's obedience, and that she was killed not for what she discovered there, but because she disobeyed his orders.

What is the moral of Bluebeard?

In many of these stories, there's some moral at the heart: be good, be good, and eventually you'll be saved. ... It's the story of Bluebeard, which people often interpret as a tale about the morality of curiosity: Do what your husband tells you, and this will never happen to you.

Why does the youngest sister finally decide to marry Bluebeard in spite of his ugliness in the story Bluebeard?

In spite of his wealth, he is unable to find a wife because he has a blue beard. This makes him look ugly and frightening. ... The younger of the two daughters enjoys herself so much that she decides that Bluebeard is really a good man and that his beard is not really so blue. She agrees to marry him.