– Attention, class! Look at the common cockroach. Beautiful, isn’t it? Most probably, it originated in the Silurian Period about three hundred and fifty million years ago. I mean, not this little chap here, of course, but his great-great-great-granddaddy. Cockroaches can be found everywhere in the world, from the tropical rain forest to the arctic, and even, I believe, in the heads of certain people in this classroom. Johnny, take that finger out of your nose! There exists no less than four thousand roach species. In a year, a single female can spawn over half a million little johnnies, ah, well, descendants. Well done, girl! Radiation doesn’t really bother them. Probably, they even enjoy it! From the survivalist’s point of view, they’re practically flawless creatures. They’ve got only a very simple nervous system. Johnny! And their life’s ruled just by basic environmental stimuli and nothing else. Unlike us, they’re incapable of thinking, of writing books or composing music… Compared to this chap, Johnny, we’re, well, gods and must therefore act appropriately… Take that finger out of your nose, Johnny! – Okay, teach… Teach-the-roach, teach-the-leech – eat the soap, lick the bleach… – What did you say? Lick what? – Nothing, teacher. My pen leaks…