You can't stop — because you never know what's coming next.

Slot machines are addictive because they pay out sometimes — not always, and not never. Social feeds work on exactly the same principle. If every post was boring, you'd close the app. But because sometimes something great shows up, your thumb just keeps scrolling. Your brain doesn't actually need the payoff. Just the possibility of one. The unpredictability itself — that "maybe this next one" feeling — is enough to keep the dopamine coming.