TO GO WITH AFP STORY BY NATALIA RAMOS Several coloring books for adults for sale in Sao Paulo, Brazil, on June 23, 2015. Considered as "anti-stress" passtimes, one million copies of coloring books have been already sold in Brazil and even got a new category: sex to colour. AFP PHOTO / Miguel SCHINCARIOL (Photo credit should read Miguel Schincariol/AFP via Getty Images)
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AFP MIGUEL SCHINCARIOL