I remember some drama about a cast iron skillet being dunked into soapy water.
I literally have no idea what the drama is here... what is "seasoning" a skillet? What's the benefits?
Enlighten a barbarian here.
Well, cast iron is highly susceptable to rust, so for some people seeing one dunked in water would be disturbing. LEAVING in water would be bad, for sure. A dunk in the washing process isn't worth killing someone over. (Unless maybe you live in Pakistan, I'm a little unclear these days on their "law") Just be sure it gets dried completely and immediately.
"Seasoning" is what happens when, over time, an ultra-thin layer of fats become hard-baked on the cooking surface of something like a cast iron skillet. It has multiple positive effects: it protects it from water helping prevent rust, it acts like a "non-stick" surface to make cooking a breeze, it darkens the color of the pan which not only looks better, but also increases heat dispersion and retention, and more that I can't think of at the moment.
When you buy new cast iron, it's recommended that you get the seasoning started by coating the whole thing with cooking oil, and placing it in a very hot oven for several hours. Over time, the more a pan is used, heated and cooled, etc., the more natural seasoning it develops. That's why many old-school cooks love and adore cast iron pans that were passed down from Grandma or even earlier... the more seasoning, the better the cooking, and there is no shortcut to replicate generations of use. The worst sin for cast iron is to use a very abrasive cleaning tool like steel wool, because that scrubs away the goodness of years of seasoning. Most people I know never wash a cast iron vessel with soap and water, they simply rinse out any solids and wipe clean with damp cloth, then dry carefully.
Best analogy I've ever heard for a "seasoned" pan? It's like a truck with a sprayed-on bedliner.