This is a good read:
https://www.soberrecovery.com/forums...influence.html (Excerpts from "Under The Influence")
I don't remember if it discusses the dopamine receptors.
Here, from the NIH:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4120286/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4691370/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3942586/
Those ^^are kinda technical...there's plenty more from the NIH (and other sources) about dopamine receptors and alcohol. Just type "dopamine and alcohol" into your browser search bar.