Little Boy said:
If you're sitting at home alone, you'll be depressed because well..you're all alone.
But if you were at home alone, sober-you woudn't be depressed unless you're suffering from chronic depression. If simply being alone causes you to be depressed then you're suffering from medical depression.
"Effects on emotional states and specific forms of behaviour are clearly extremely hard to demonstrate, as to prove that alcohol produces, by way of action on the CNS, psychological changes which lead to particular behaviours, one must control for the influence of social and cultural factors and individual expectations regarding the effects of alcohol. The anthropological literature shows how central aspects of culture can radically shape the ways in which people learn to drink and the patterns of behaviour which are associated with alcohol consumption. The different patterns of learning fostered by different cultures, and the novel modes of learning that acculturation can present, do not only provide models of appropriate and inappropriate drinking habits, they also create sets of expectancies regarding the behavioural effects of alcohol."
“There is overwhelming historical and cross-cultural evidence that people learn not only how to drink but how to be affected by drink through a process of socialisation...Numerous experiments conducted under strictly controlled conditions (double-blind, with placebos) on a wide range of subjects and in different cultures have demonstrated that both mood and actions are affected far more by what people think they have drunk than by what they have actually drunk...In simple terms, this means that people who expect drinking to result in violence become aggressive; those who expect it to make them feel sexy become amorous; those who view it as disinhibiting are demonstrative. If behaviour reflects expectations, then a society gets the drunks it deserves.”
"Expectations not only shape drunken behaviour, they also enable subsequent rationalisation, justification and excuses (MacAndrew and Edgerton, 1969; Gusfield, 1987). In cultures where there is an expectation that alcohol will lead to aggression, for example, people appeal to the fact that they were drunk in order to excuse their belligerent conduct."
Just a few inserts from one of the most reputable studies done on alcohol.