A few years ago I watched (and kept) this movie but I somehow lost it. I think it was B&W but I'm not totally sure. It seemed like a 60s movie. It was on this island with few inhabitants. It was a normal drama-like movie with a guy trying to woo this lady but then she started to notice something weird about the inhabitants and then saw them needing to be "serviced" (no not like that you dirty-minded reader) and realized that all of the inhabitants weren't human. Hopefully someone knows because I would like to watch it again.