Twenty thousand Arizona Diamondbacks fans sported full-arm tattoos at Chase Field over the weekend. Beauty, as they say, is in the eye of the tattoo artist's needle, but the attractiveness of these intricate nylon sleeves was that they could be removed at the end of the night. The right to bare arms was protected, and everybody went to school or work or the senior center Monday without needing a tattoo-concealing long-sleeve shirt on a 103-degree day. Ink with no stain, body art with no regrets. As someone who has seen countless inked-up athletes and had the tattoo gun strike close to home, I'm all for these temp tats. In a first-of-its-kind promotion, the D-backs handed out the slip-on tattoos before their game against the San Francisco Giants on Saturday. A real tattoo, like true love, is forever. Nylon sleeves are the equivalent of a one-night fling, a way for fans to feel the deeply etched passion Diamondbacks ink-stained wretch of a third baseman Ryan Roberts feels...