>>47874059Sure, when you constantly flood your brain with dopamine, which is like a pleasure chemical that is easily gotten these days with the instant gratification from cell phones, movies, low effort activity that entertains, the receptors for it in your brain become less receptive to it, like building a tolerance to caffeine, for example. It's like alcoholism without the nausea. If you're not on your phone undergoing low effort rewarding activities like getting likes on Instagram or looking at porn, you become bored and unstable easily because your brain is chemical set to have a constant flow of dopamine. Low dopamine activities like reading can actually help to correct this chemical addiction.