Eli5: Why exactly do neurotrandmitters make us “feel good”

Question

Edit: read my comment down below for clarification

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Answer 1

I remember seeing a yt video on machine learning and evolution where neurons were initially programmed to fire erratically, and to encourage the desired behaviour, the neurons were rewarded by firing in an orderly manner when the correct result was achieved. The neurons were basically coded to prefer order over entropy.

How realistic is that for real neurons in animals and humans? Dopamine feels good, but why? I struggle to understand what’s exactly happening in the brain to make certain chemicals like oxyctocin, serotonin “feel good”.