I watched The Lighthouse with my dad a few years ago and I think that was the most awkward movie watching situation I’ve been in. We decided to watch it because it had Willem Dafoe on it, a positive rating, and it was on a streaming service he had. It’s not really a spoiler but the movie has multiple scenes with a focus on masturbation. Neither of us turned it off because we kept assuming that was the last of it and we would have had to get up for the remote.
In my early teens I got into scifi movies, so as a family we rented Barbarella. My mum had to check the vhs cover, she thought the video store had given us an adult film by mistake.