system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do toddlers enjoy making people smile and laugh so much?

Almost every small child I have been around will repeat over and over again something that they did that made you laugh, and they will keep doing it as long as you keep laughing.
gpt
Positive feedback. It's just like the rat who keeps pushing a lever to make food come out of a dispenser in his cage. The rat (or the toddler) doesn't understand the mechanism that produces the positive result, only that the action produces the result, so they keep repeating the action.