Sex Panther said:
I'd go with The Lost Boys. I think it may be rated R, but its pretty tame by today's standards. I love that movie.
You can use this site to make judgments:
https://www.commonsensemedia.org/movie-reviews/the-lost-boys/user-reviews/adult
Yeah, Lost Boys is a Two Coreys movie with boy band vampires.
I think the original 80's scary movies would be okay, even if R -- Halloween, Friday the 13th, Nightmare on Elm Street, Poltergeist, Carrie, Cujo, Prom Night, Christine.
Those probably won't cause scarring nightmares like The Shining, The Exorcist, Amityville Horror, Prince of Darkness would.