If you think being “taken” against your will is a scary thing, that’s nothing if the one “taking” you is not of this world…..
Ones have reported being molested, raped and even made love to by ghosts for hundreds of years. If you believe a person has a soul, then a ghost isn’t really so far fetched, it’s just a soul not currently in a body. Yes, most “move on”, but some are unable to leave the earthly plane they were accustomed to and form attachments to people.
Sometimes these attachments can get physical. Ones are usually very reluctant to mention these sorts of experiences, since most know they will be mocked and disbelieved, so it’s easier just to keep it to yourself, so many cases, likely most, would go unreported.
And if what the spirit is doing is pleasurable, I doubt you would be going around telling anyone and chancing ruining a good thing.
Sometimes the phantom lover is a spouse who suddenly passes away and is unable to leave their spouse behind.
Hollywood has touched on this theme in a few different movies, but sex with spirits wasn’t quite shown. “Ghost” was a popular movie of a man that couldn’t leave his lady behind. There was also a t.v. movie with a cult following with Jane Seymour called “The Haunting Passion”. I remember it well from when I was a pre teen where she falls in love with a ghost and they have an affair. Very good movie about this very thing.