Why is a child saying ‘Na-na, na-na-na!’ so annoying?

. UK edition

A cute kid pulling a face and sticking her tongue out
Too cute by half … Photograph: People Images/Getty Images (posed by a model)

The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts

Why is a child going “Na-na, na-na-na!” annoying the world over? I read recently that kids do a version of this in every culture and country. Fred Corbett, London

Post your answers (and new questions) below or send them to nq@theguardian.com. A selection will be published next Sunday.