I asked my editor if I could get a tattoo for journalistic purposes. She said no. Tomorrow is the second, and last, Friday the 13th of the year. (A calendar year will have one to three.) The day is essentially a tattoo holiday where artists offer small $13 — or discounted — tattoos that are pre-designed. The holiday is special not just because of the price, but the overall experience. Popular tattoo shops that participate can be packed with lines out the door.