Oh dear, that does not sound like a good evening. I'd already decided not to see this one after one review praising it, and that didn't even mention the wanking.

Honestly, if someone wants to make an actually original take on Flannan Isle then they should make it a comedy in which the lighthouse is visited by a time-traveling spaceship and the lighthouse keepers happily get on board to go and explore the universe. Actually, that's probably more a Doctor Who episode.