Honey I'll go over this in a different way, maybe you'll understand.

Addiction is like the Mafia, people only get fully in it because they are foolish enough to dabble in the first place or because their family is already involved. (Heredity vs. Environment)

Since addiction is hereditary it makes me wonder about the accuracy of your alcohol consumption statements. You say once a month, I am wondering if there is someone who knows you that will say different.