In Mexico City, the blind leading the blind is not precisely a figure of speech. It is fairly common to see one unsighted person walking with a cane, followed by two or three equally visionless cohorts, each with a hand on the shoulder or waistband of the person in front of him. I found this threesome on the metro, and asked the leader if I could help them up the closest staircase. He refused, saying he would prefer to go down the aisle to find the escalator. "Soy medio güevón," he explained, which means, more or less, "I'm kind of a lazy bastard."