Slots does not take any skill or use of the brain. Also, you do not have to learn the game and use strategy. Simply pull a handle and wait.
Kind of like the old joke.
There was a blonde girl standing in the lobby in a casino. A gentleman from afar stood and watched her excitement with amazement. She would put money in a soft drink machine, push a button, then jump up and down with joy. Finally, after about 20 minutes of observing, the gentleman went over and asked the lady, "What are you so excited for, and what are you doing ?" The blonde turned to the man and replied "Duh, winning."