https://www.newsy.com/stories/the-neuroscience-of-addictive-television/
When you watch something on TV that you enjoy, your brain produces dopamine. Repeated production of dopamine — like during a weekend of binge-watching — can result in a "drug-like high."
"It is the brain's signal that communicates to the body, 'This feels good. You should keep doing this!'" That's the way Dr. Renee Carr, a clinical psychologist, put it to NBC. Carr calls it a "pseudo addiction."
Oh, and one more thing about dopamine: If you feel euphoric right before sitting down to watch your favorite show, it's because the initial burst of dopamine occurs in anticipation of the reward. It sort of primes you for more to come — magnifying the feeling. In a world of responsibilities, the tube sucks you in. It's a great escape. Nielsen reports that adults spend four hours and 10 minutes a day watching live TV.