Mr Lock said the pair had discussed acting out a master/slave sex fantasy for months before it happened on August 6 last year.
Mr Lock said they agreed to use the code word ‘red’ if either of them wanted to stop the role-play but, he says, the woman never mentioned the word.
She claims he put a rope around her neck, padlocked her wrists and made her bend over on the bed where he whipped her 14 times, cause 14 centimetre bruises on her backside.
After the whipping Mr Lock had sex with the woman and left her tied up while he used his computer.
The woman was able to send a text and a picture of herself tied up to a friend asking him to call the police because she had been ‘chained up and whipped like a dog’.
Mr Lock eventually released her and told her to leave which is when police turned up at his residence and noticed the woman in the street in a distressed state.
Asked by defence counsel Roger Thomson if Mr Lock and the victim had read Fifty Shades of Grey, Mr Lock replied: “That’s where we got the idea from.””
He said: “It’s the right verdict. This case should never have reached court. As far as I’m concerned, it was a consensual activity between adults.”
The court heard the couple took part in group sex and bondage together and the woman had the words “Property of Steven Lock“ tattooed around her genitals.