system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What causes some people to be heavier sleepers than others?
gpt
Kind of piggybacking off this question a bit, but does being calm and stress have anything to do with this? Could trust also be another thing? As in if you felt you were in danger (Living in a warzone or something) you would wake up faster and easier.