A woman was called "frigid" by a stranger who raped her and then dumped her on the side of the road in Melbourne's south-east.
Sex crimes detectives are hunting for the perpetrator, a man who they said took advantage of a woman who hitchhiked home.
"Regardless of the time, location or decisions made, she did not ask to be sexually assaulted," Detective Senior Constable Steve Phillips said.
The 49-year-old woman had an argument with a friend and left the Beaconsfield home at midnight on Sunday, July 30, and began walking home to Pakenham, he said.
The 10 kilometre walk was too far so she stuck her thumb out along the Princes Highway west of the Whiteside Road intersection to hitch a ride home.
A man driving a white single-cab, flat-tray ute stopped to give her a ride and what started as a pleasant conversation turned.
"She initially thought he was a nice guy and she was just going to sit there, talk to him for a while and then he was going to give her a lift home," Detective Senior Constable Phillips said.
He pulled over in Starling Road, Officer, near the Glenvale school and a football ground where he raped her.
"He's taken advantage of someone that was basically by themselves," Detective Senior Constable Phillips said.
He then drove her in the vicinity of her home, speaking to her in a derogative way and calling her frigid, the policeman said, before dumping her out of the car.
The victim told police her attacker looked Caucasian, was aged in his 50s with a medium build and sandy hair that was short on the sides and curly on top. He told her that he lived in Warragul, she said. Police have composed a computer-generated image of what he looked like.
The car looked similar to a white 2001 Toyota Hilux single-cab flat-tray ute that was brown with no sides or back, she said.
Anyone who can identify the perpetrator or has any information should phone Crime Stoppers on 1800 333 000 or submit a confidential crime report.