Here's why:
* Dismissive and condescending: The narrator constantly belittles the children's interests and questions, mocking their desire for exciting stories.
* Lack of empathy: The narrator fails to understand the children's perspective, dismissing their anxieties and fears.
* Imposing his own narrative: The narrator insists on telling a story that is "suitable" for them, rather than considering what they might actually enjoy.
* Lack of respect: The narrator uses sarcasm and makes fun of the children's attempts to participate in the storytelling.
Ultimately, the narrator's bias is evident in his dismissive attitude, his lack of understanding, and his overall lack of respect for the children.