system
Given the following post, respond as if you're commenting on Reddit:
human
Why do people never forget how to ride a bike once they've learned?
gpt
The fear of falling is the main reason why it's hard to learn in the first place. You need a certain amount of speed to keep it upright, but a higher speed = a more painful experience if you fall. So the tendency is to want to start off slowly, causing a wobbly ride. The intricate details of which gear to use, how to pedal properly, to brake without flying over the handlebars, those could probably be forgotten.
What "clicks" in your head is that you actually have more control over the bike if you get it moving a little faster, and less if you slow down. This is such a simple cognition, and something you won't forget.