'It will end when I die': Mustafa was 14 when he was first raped by a group of men. Now, 80 assaults later, he reveals how dancing boys are being dressed as girls and brutalised by sick Taliban officials - and why it's getting worse

He cannot escape the memory of the knife. He holds his hand up and shows me the scar on the underside of his arm, just below the wrist. 'I resisted,' he explains, 'so they forced me.'