You pick up your phone to check the time.
Twenty five minutes later you surface, thumb still moving, no memory of the last ten things you scrolled past.
If this feels less like a choice and more like something happening to you, that's because it is.
Your brain isn't broken. It's working exactly as designed, just not for your benefit.
Every time you scroll, you're pulling a slot machine lever. Sometimes the post is boring. Sometimes it's a picture of your ex's new relationship, a stranger's meltdown, or a video so oddly satisfying you watch it four times.
The unpredictability is the point. Psychologists call this a variable ratio reward schedule, and it's one of the most addictive patterns known to behavioral science. It's literally what casinos are built on, and it works on almost everyone, regardless of age, intelligence, or how aware they think they are of the trick.
Your phone didn't stumble into using it. Thousands of engineers, sitting in rooms much like the one you're reading this in, get paid specifically to make that lever a little more irresistible each year.