Concrete
I was eating my lunch and a couple started to sit down near me on a concrete slab at the border of the lunch area.
"Don't sit there!" the man urgently warned the woman.
"Oh thanks," she said, and checked her erstwhile seat for bird poo or whatever, finding none. "Um, why not?"
"It's concrete!" the man replied, looking at her like she was stupid.
"So?"
"Concrete dehydrates you! Haven't you ever seen how there's puddles on it after rain, but it sucks them up? If you sit there too long it'll kill you by absorbing all the water in your body out of your butt."
"Oh my God!" She clutched her hand to her mouth, horrified. "I've been sitting on concrete all my life!"
(clohman, Sun 9 Jan 2005, 4:11, Reply)