The long-running series in which readers answer other readers’ questions considers a universal juvenile put-down

• This week’s question: will there ever again be a band as big as the Beatles or the Stones?

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

Send new questions to nq@theguardian.com.