Ok how to tell an alcoholic. Well a guy that drinks on occasion gets a fly in his beer and will ask for another beer.

The guy that drinks nightly will get a fly in his beer and picks it out and drinks the beer, alcohol kills it all right? Well the true alcoholic will get a fly in his beer he'll pick it up, grab it by the wings and say "Spit it out, spit it out you little f**ker!"