Sixty-four-year-old John Leonard MacKean testified in his defence yesterday as the case wrapped up in Bridgewater.
He says the alleged victim didn't seem upset and wasn't in chains on the day they had a sexual encounter.
MacKean told the jury if he had felt the youth was distressed, he would have made sure he was freed.
He is pleading not guilty to sexual assault and communicating for the purpose of obtaining sexual services from a person under 18.
The youth, now 17, testified earlier in the week he was chained to a bed, unable to move, and cried as a balding, heavy-set man who wore glasses performed oral sex on him.
Crown prosecutor Lloyd Tancock says the youth should be believed and he questioned MacKean's testimony that the boy was not upset, calling his statement "preposterous."