That give me an idea for a future research study: Curing the cell phone dopamine addiction with replacement behavior... like fishing. Research shows that we are addicted to our phones buzzing with texts, likes, messages, friend-adds, etc. because it elicits a release of dopamine in our brains, a neurotransmitter that contributes to feelings of happiness.
I'd bet the same process happens at the synaptic level when we see our rod-tips TAP TAP TAP. Maybe an interesting research project for an UPSAC redux, Ken? I'll get started on the IRB.....