There are people who don't really get drunk, but have a drink every now and then. If a person has a glass of wine after dinner, or a beer after work I don't think that would make them a alcoholic. If someone is a responsible drinker how could they develop a problem. There are some people who only have a drink or two around Christmas. People have different personalities from what I've observed, it could be possible that addiction is based on a persons responsibility level with alcohol.