Satoshi Kanazawa reports on the link between smart children, and the larger amounts of alchohol they consume as adults. The studies controlled for "both income and education, as well as childhood social class and parents’ education." The study concluded:
“Very bright” British children grow up to consume nearly eight-tenths of a standard deviation more alcohol than their “very dull” classmates.
It's what Oakeshott called "the ordeal of consciousness." When you have constantly charging brain, you need to shut it off sometimes in order to breathe and live. It's no wonder so many brainiacs self-medicate in this way. The key thing, as always, is moderation.