The Reality: Your cast iron pan (and mine) may be really really really non-stick—non-stick enough that you can make an omelet in it or fry an egg with no problem—but let's get serious here. It's not anywhere near as non-stick as, say, Teflon, a material so non-stick that we had to develop new technologies just to get it to bond to the bottom of a pan. Can you dump a load of cold eggs into your cast iron pan, slowly heat it up with no oil, then slide those cooked eggs right back out without a spot left behind? Because you can do that in Teflon.

Yeah, didn't think so.

That said, macho posturing aside, so long as your cast iron pan is well seasoned and you make sure to pre-heat it well before adding any food, you should have no problems whatsoever with sticking.

Rinse out any excess soap with water, then place the skillet over a burner set to high heat. When most of the water inside the skillet has dried out, add a half teaspoon of a neutral oil like vegetable, canola, flaxseed, or shortening. Rub it around with a paper towel. Continue heating the pan until it just starts to smoke then give it one more good rub. Let it cool and you're done.