I asked this question on Facebook and got a total of two replies (probably because FB's new "Ask a Question" feature is, really, kind of annoying), so here it is. It's the middle of the night. For some reason you're staggering through your living room with the lights out...and you step on something. What would you rather step on? A Lego brick that your kid left out, with all of its very sharp corners to dig into the soft flesh of the underside of your foot? Or the wonderful, cold squishiness of three-hour-old cat vomit?
(I literally can't decide which of these I'd rather have happen less!)