Burnley Crown Court heard how Richard Layfield (24) took advantage of the vulnerable victim in front of her friend on parkland in town.
The 33-year-old woman, said to have serious learning difficulties, has been left traumatised by the incident.
Layfield was said to disrespect women, be a risk-taker and to “contravene social norms.”
The defendant, of Hufling Lane, Burnley, had admitted three counts of sexual activity with a person with a mental disorder. He was also given six years extended licence and was placed on the sex offenders’ register indefinitely.
Zoe Nield (prosecuting) said the defendant claimed to have kissed the woman on the cheek and said they had chatted. Layfield said he knew the victim had learning difficulties and would not have taken part in any sexual activity with her.
The defendant was later spoken to again by police and gradually accepted there had been contact.
Brian McKenna (defending) said: “The victim came across to him as being slow and he took advantage of that.”
He had been talking to the woman and the conversation became sexualised. Mr McKenna continued: “He accepts he knew she was slow, but he wouldn’t have known the full extent.”
The woman had said she was not frightened of Layfield, thought he was nice and no force was used.
Sentencing, Judge Jonathan Gibson said reports described Layfield as posing a very high risk of reoffending. He had a lack of empathy and did not acknowledge the inappropriateness of his behaviour.
There’s more on this court report in your weekend Express.