system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why do your dreams seem longer the less you sleep?
gpt
Generally you forget almost all of your dreams. You go through multiple REM cycles (Rapid Eye Movement) in which you dream.

Over the course of the night, you dream, forget and dream. If you sleep less, that means less dreams for you to remember and the more you'll remember about these dreams.

This is why when you smash your alarm for another five minutes and scream into your pillow until you collapse asleep, you can dream what seems like an entire lifetime.