If it's true that taste and smell are most closely linked to memory, explaining my affection for the Guinness Storehouse in Dublin would be simple. Years have past since I last set foot in my ancestral homeland of Ireland and yet I've continued to seek a pint of Guinness to rival that poured at St. James's Gate in Dublin.My search has been to no avail.Is it possible that at the dawn of my youth I'd already experienced the perfect pint?Whether the pint itself was as magical as my …