In earlier, younger years, material birthday gifts are greatly anticipated and desired. Yet when 30 approaches, one usually has more than enough "stuff" to fill their lives, and if a baby shower or wedding is on the horizon then more objects may soon be on their way.
This appears to be the reason why alcohol becomes the gift du jour for the Triple Decker. Starting with age 21, "buying you a drink" becomes a birthday custom, but by age 30, the gifts of alcohol become even more specialized. Unique wines, select bottles of top shelf alcohol, even illegal foreign liqours may be bestowed upon one at their 30th birthday and beyond. Those who survive their 30s can look forward to even more exotic alcoholic gifts at their 40th and 50th birthday.
This phenomenon may also help explain why Triple Deckers show a heightened interest in fully stocked home bars and wine tasting parties. They also are more likely to be spotted enjoying a neatly filled sherry glass rather than a frothing Oktoberfest-sized stein. Of course, the irony is that this appreciation of alcohol gained with age is inversely proportional to one's alcoholic tolerance... not to mention the hour one can comfortably stay up "appreciating" said alcohol.