10:06Deeply HumanLyingBBC World Service Duration: 23 minutes Sun 21st Mar 2021, 10:06 on BBC World Service Americas and the CaribbeanAvailable for over a yearListen nowWhy it’s a milestone for toddlers but a slippery slope for everyone else. Show more GenresFactualLife StoriesFormatsDocumentariesBrandDeeply Human Source: BBC Online