A slow-witted villager who subjected a six-year-old boy to 'an ordeal of sexual degradation' in front of even younger children was yesterday jailed for six years. Chan So-kan, 40, was nicknamed 'The Simpleton' and 'Uncle Fatty' by children in the New Territories village where he carried out six sexual assaults on the boy in a public toilet. Deputy Judge David Gill, at the Court of First Instance, said Chan lured his victim and four other children as young as three to the toilets with the promise of sweets, and concealed his crimes by threatening to chop them if they told. A psychiatrist's report stated that 15 months after the incidents, the child remained anxious, inhibited and nervous. He also suffered nightmares and respiratory problems. 'He is a very frightened and disturbed little boy. He was subjected to acts of gross sexual degradation, which must have come close to sodomy, in the presence of his peers. And it all happened six times,' the judge said. 'The potential injury to a victim of such tender age is great.' Chan was found not guilty of six counts of buggery but guilty of six alternative counts of indecent assault. The incidents occurred over a six-month period from about May last year. Defence counsel Ko Chun asked for leniency for Chan, saying he was of low intelligence. 'The circumstances of the case, and the manner in which the abuse took place, appear inexplicable. 'The defendant may be sick, may be suffering from some mental illness,' he said. 'It's not the act of a normal person. How can it be?' Deputy Judge Gill said: 'Although the evidence reveals other children were violated, there was only one child in respect of the conviction and over whom I am now to sentence.'