Images of Halloween invoke death, decay and the unknown. They're the taboo subjects that spooked us as over-imaginative children and that we'll fear again as we get close to our own physical collapse.
But the reason Halloween is my second favorite celebration is that it's the only big American holiday without an emphasis on family, loved ones or lovers. Halloween is for single people! On this day and no other in our culture, it is okay for a lone person to scrape along in some bizarre outfit, completely conspicuous among the general population.