Hi Anton,
I'm not sure the reason is entirely known. It can be genetics which I think could be my case but it could also be a social factor. I just really liked the way it made me feel so I wanted to feel like that all the time. I didn't really drink for 40 of my 49 years but once I started it continually got worse meaning I needed more and more to get the same effects. I think this is a question that most alcoholics ask and would really like an answer. There si stickies with some excerpts from "Under the Influence" which has some good theorys.