  A conversation (circa. 2001). Kyle: (looking at meat grilling) Man, look at that. That was alive once. Me: Don't be too sad for the cows, dude. If it weren't for us, the cows would not be alive in today's world.
What purpose would a cow serve besides for food? Kyle: Then what purpose do we serve? Me: To eat the fucking cow! Two signs I saw whilst on my lunch break. "MOTORCYCLES USE EXTREME CAUTION" (on a wide open road) "Caution: CARS PARKING" (In a PARKING garage. "Is this where I park my squirrel? ") Manufacture paranoia. Sell more Subarus, safety scissors and wars. 
