system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do we still feel the rocking motion at night after being on a boat for a day?
gpt
Your ears have little tubes in them with fluid in the tubes. When you lean one way, the fluid stimulates one side of the tube and it gives you the sense of motion. On a boat, the tubes are constantly stimulated in the same pattern, your body gets use to this and anticipates it.