16:23The EssentialThe Why Factor: Graffiti – Why do we do it?BBC World Service Duration: 6 minutes Wed 7th Oct 2015, 16:23 on BBC World Service Americas and the CaribbeanGraffiti is both an ancient and modern activity, but why do we do it? Show more GenresReligion & EthicsFormatsMagazines & ReviewsBrandThe Essential Source: BBC Online