Gavin Davies, the author of Ghost Sex, claims he was approached by a local man, who told Mr Davies he was tricked by a ghost disguised as a beautiful hitchhiker.
He told Wales Online: "I was approached by a man who did not want to be identified because it could expose him to ridicule, who told me he picked up a hitchhiker who turned out to be a ghost that seduced him.
"He said that he was driving back from a date that hadn't gone as planned.
"I was choking, and I thought I was going to die. I was crying and everything. I was passing out"
"He saw a beautiful woman on the side of the road and he picked her up."
Mr Davies continued to explain how the man, known as 'John', later pulled over his car and took the mysterious stranger into a public toilet.
There they engaged in 'graphic' sex - before something terrifying happened.
The man told Mr Davies: "Then I started to smell something strange, at first I thought it was like a cigarette smell.
"I was choking, and I thought I was going to die. I was crying and everything. I was passing out.
"I just wanted a policeman to start banging on the window and save me.
"I pushed her back with all my force and there was not a pretty girl on me but some haggard, disgusting old woman with some kind of awful skin condition.
"I just screamed and screamed and she just vanished."
Mr Davies, whose book Ghost Sex has sold over 3,000 copies online, has said that the man could have been affected by sleep paralysis.
Sleep paralysis is a condition where the victim feels wide awake but is unable to move a muscle.
It is often accompanied by delusions of being watched by a menacing presence.
Ghosts caught on camera: CCTV footage of real-life spooks
The Mirror Ghost - Unknown
This video begins sweetly enough, focusing on a little girl as she does her hair in a big dressing room mirror.But, towards the end of the video, something seriously disturbing happens - because, as the little girl turns away, a black-eyed little doppelgänger continues to stare out the glass at her.Watch it for yourself here.
The Glass-Shattering Ghost - UK
When the owners of Barnsley Antiques Centre found a glass cabinet smashed over their floor, they assumed that someone had broken in.But, when they checked their CCTV, they watched in horror as the cabinet shattered all by itself in the empty room.Watch the footage for yourself here.
The Killer Ghost - USA
This unnerving elevator surveillance tape, that records a young woman’s strange behaviour in an elevator, has been claimed by many to show proof of ghosts.Why? Because it features the last few moments of Elisa Lam's life. Her body was discovered in the rooftop water tank two weeks later, after guests complained that their water 'tasted funny' and was a strange colour.The rooftop was alarmed, the tank was 8-foot-high, and she managed to close the heavy lid after herself, despite the fact workers had to cut it open with tools to remove her body.Many paranormal investigators have claimed that this - along with the frightening footage - proves that Elisa's death was caused by supernatural forces.Watch it for yourself here.
The Police Station Ghost - USA
Officer Karl Romero based in New Mexico, was stationed in the surveillance room monitoring the CCTV cameras when he noticed some spooky goings-on in the gated area.He claimed he spotted a phantom-like creature gliding across the sally port (a controlled entryway which is completely sealed off).And the CCTV cameras have captured the moment the blurry whitish figure appeared.Check it out here - the ghost appears at 0:30.
The Pub Ghost - UK
Ye Olde Man and Scythe in Manchester is thought to be 'Britain's most haunted pub'.And now a new video, which has captured a ghostly apparition in the Bolton boozer, has left the pub manager 'convinced' the premises is haunted.The footage, shot by a Portuguese visitor to the area, sees a strange flickering light at the window of the 763-year-old pub.Check it out here.
The Pub Ghost (Part 2) - UK
Speaking of the Ye Olde Man And Scythe pub, that's not the only footage they have of ghosts in their boozer!Speaking with the Manchester Evening News, pub manager Tony Dooley said: "I came down and saw a glass smashed on the floor so I was instantly suspicious and went to check the CCTV and found it has stopped working."We checked the footage and it revealed this figure.""To be honest I was a bit concerned - I'm a bit of a sceptic when it comes to ghosts but you become more of a believer when you see things like that."Watch the footage for yourself here.
The Motorway Ghost - USA
This 47-second clip, uploaded to the video sharing website YouTube, begins with footage of a man walking down a darkened street in the American town of Jackson, Wyoming.But, as he walks past a sign for Rocky Mountain Bar, something strange begins to happen - and the man's body begins to fade into nothingness.Stranger still, as his body slowly lets into the air around him, his feet are replaced by two white strange white dots - which continue to move across the screen before disappearing entirely.Check it out here if you don't believe us!
The Football-Loving Ghost - Argentina
In this strange video, a ghostly figure can be spotted jogging around the field on camera during the match between Racing and River Plate. The ghost is seen going back and forth at the football stadium while the match is going on.Check out the footage here.
The Blockbuster Ghost - Mexico
Employees of a BlockBuster movie-rental store in Mexico have often spoken out about the strange things that occur there late at nigh.From being touched on the back of the neck, to feeling breath in their ears, to watching the flickering of lights, there's not been any video evidence to back up their claims.Until NOW, that is. Watch it here - you couldn't pay us to work in this store!
The Chair-Stacking Ghost - USA
In this video, terrified home owner Philip Shapiro can be seen catching the 'poltergeist' terrorising his home on video tape. Philip was instructed by paranormal expert Dr Von Koeslter to document any natural phenomenon occurring in his home - and decided to do so by walking through his kitchen with a camera.However, as soon as he leaves the room to go upstairs, he begins hearing strange noises and rushes back down - only to discover the spook has been stacking chairs.Watch it for yourself here - do you believe?
The Ghost Children - USA
As Joey quite rightly states in Friends, there's nothing scarier than a creepy child ghost.So spare a thought for this couple, who were horrified to discover - using hidden cameras - that they had at least TWO ghost children hiding out in their basement.The creepy footage shows a collection of toys moving by themselves in a darkened basement, and it certainly gave us the chills.You can view it for yourself here.
The Disneyland Ghost - USA
It's the happiest place on Earth, apparently - so it makes sense that ghosts would want to stick around and beat the queues at Disneyland when they reach the afterlife.This creepy footage shows a spooky figure wandering through the park late at night, looking oddly translucent on the CCTV cameras.And, yes, before you ask, several people have died in the popular amusement park - and nearly all in gruesome circumstances.Watch the footage and decided for yourself here.