I want to travel on a train that smells like snowflakes. I want to sip in cafes that smell like comets. Under the pressure of my step, I want the streets to emit the precise odor of a diamond necklace. I want the newspapers I read to smell like the violins left in pawnshops by weeping hobos on Christmas Eve. I want to carry luggage that reeks of the neurons in Einstein's brain. I want a city's gases to smell like the golden belly hairs of the gods. And when I gaze at a televised picture of the moon, I want to detect, from a distance of 239,000 miles, the aroma of fresh mozzarella.