A male character was taught what kissing is, so he demonstrates it (against community rules) on a nervous and surprised female character without talking her through it. This part was not in the book. It can be hard to take.
There is a scene wherein a living character, as well as a character that is known to have died, are shown, living, translucently, as ghost-like figures.
Multiple flashbacks/memories shown in this movie are filmed with strobe lights. As someone who isn’t affected by strobe lighting, it even made me feel ill.