Under the Skin is a favorably disturbing Sci-Fi book and movie.
A brutally attractive alien lures in men and they think they are going to visit her special purpose. They end up suspended in a large pool of transparent goop and are eventually turned into human slush that is collected and sent off to the controlling aliens in some far off place. That's the Sci-Fi part.
Throught the movie, the attractive alien sees that humans care for each other and questions what she is doing.
Really worthwhile if you have a little patience. Movie and the (audio) book. I loved both.
Still from movie:
