Why even take ONE drink if you are susceptible. If one has to explain this to you, then it is and will always be impossible for you to understand. Best thank God Almighty that you were not born with a genetic propensity for alcohol addiction.
I suggest that you read "The Doctors Opinion" that is central to understanding alcoholism.
https://aa-netherlands.org/wp-content/uploads/2017/01/en_bigbook_foreworddoctorsopinion.pdf Before you do, please remember this very important principle:
"There is a principle...which is a bar against all information...which is proof against all arguments...and which cannot fail to keep a man in everlasting ignorance. That principle is Contempt Prior To Investigation". -Herbert Spencer
KYW