Alleged killer Robert John Adams liked to play a game with two of his mates.
The trio would pretend to be pilots, barristers, police and even "football stars" and see how many women they could sleep with on a weekly basis.
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Police: 'Did you kill Mary Wallace?'
The NSW Supreme Court as been played the police interview of Robert John Adams who is alleged to have killed nurse Mary Wallace in 1983.
Points were scored for each woman they had sex with.
"That's what everybody did ... it was a contest for, between us, who could get laid the most and we sort of bragged about it and you know, we just sort of, you know, couldn't say I was a silly old carpenter, could I? Doesn't sound exciting," Mr Adams told police in an electronically recorded interview after his arrest.
![Robert John Adams leaves the NSW Supreme Court during his murder trial.](/web/20161007090850im_/http://www.smh.com.au/content/dam/images/g/r/p/h/f/a/image.related.articleLeadwide.620x349.grvhyy.png/1475678591084.jpg)
"I was a sleazebag then and to get a lay, it was, you know, it was the purpose of getting laid and you just told a pack of bullshit to get laid," he said.
Mr Adams' interview with police was played to the NSW Supreme Court as part of evidence in his trial for the murder of nurse Mary Wallace in 1983.
Ms Wallace was last seen outside a Crows Nest wine bar getting into Mr Adams' car early in the hours of September 24.
The Crown alleges Mr Adams raped and killed Ms Wallace before disposing of her body.
![Robert Adams is accused of murdering nurse Mary Louise Wallace.](/web/20161007090850im_/http://www.smh.com.au/content/dam/images/g/r/p/6/1/d/image.related.articleLeadNarrow.300x0.grvhyy.png/1475678591084.jpg)
Mr Adams was arrested in 2013 after advances in technology were able to match two hairs found in the boot of his car to hair found on Ms Wallace's hairbrush.
On the night in question Mr Adams told police that he remembers "playing" with Ms Wallace in his parked car somewhere near Willoughby Road at Crows Nest.
After consuming 20 to 30 schooners of beer that night, Mr Adams said he fell asleep and when he woke up, Ms Wallace was gone.
When police asked him during an interview whether he had sexual intercourse with her, Mr Adams said he could not remember.
"I know my little fella was out, that was about it I think. Oh I remember playing with, with her, you know, and then just, that was for a while," he said.
Three women who were allegedly raped and choked by Mr Adams in the 1970s were expected to give evidence during the trial.
On Tuesday one woman told the court of how she had met a man named "Bob" at a North Sydney wine bar in 1978.
She explained that after accepting a ride home, the man locked all his car doors, pinned her down and raped her with his hands around her throat.
"I didn't think I was going to get out of that park alive ... There was nowhere to run."
Afterwards, "Bob" drove the woman to his home, locked her in his bedroom and raped her, the court heard.
Mr Adams has pleaded not guilty to murder, and told police during a recorded interview after his arrest "I'm not into violent sex".
When told by police that two hairs belonging to Ms Wallace had been found in the boot of his car, he was not able to offer any explanation.
The trial continues before Justice Richard Button.