هيا بنا نتناقش

[Abbadi]

Sec 2, unit 8, lesson 1, Ex 2, Listening text on TG page 128: Would mind telling us about Maupassant's life?" The affirmative is "no" and the negative answer is "yes", but the speaker here answered in the affirmative with "yes". Why?

informal I wouldn't mind (= I would like) something to eat, actually.
Would you mind turning (= Please would you turn) your radio down a little please?
Do you mind if (= May) I put the television on?