I’ve drawn the Pirate into listening to Alain de Botton’s Status Anxiety. It’s the kind of audio book where we stop the playback every few minutes so that we can talk about what’s being said.

One of the points he made was this: “As our standard of living goes up, the luxuries become the decencies, and the decencies become necessities.”

I realized that I had only considered two classes of things: necessities and luxuries. When those are your only choices and you divide all the stuff you own into one of those two camps, you either sound like a delusional hedonist who classifies having a car for each person in their household a “necessity,” or like a rich liberal apologizing by classifying owning a computer as a “luxury.” Granted, what qualifies as “necessary” depends on your circumstances. If you work from home at a tech job, a computer is a necessity. For families living in dense urban areas with public transportation where only one spouse has a full-time job, having more than one car isn’t necessary. Convenient, but not necessary.

Here’s where the idea of “decency” comes in. It’s the idea of a thing that isn’t a luxury, but is a step up from a necessity. The wonderful world of hygiene is a great example. We all agree that keeping clean is a necessity: the first line of defense against diseases ranging from the common cold to cholera to ebola. If we agree that hygiene is a necessity, and hygiene means soap and water, we also agree that soap is a necessity.

If you are the hardy type, you can mix the same lye you use to unblock your drains with some water, add your cooking oil (including bacon grease and meat trimmings), and create a soap that will burn your skin, smell bad and serve your purposes. That’s necessity. Buying lye in bulk and using only your used cooking grease, soap made this way would cost a just under two and a half cents per ounce. When I was a kid, my mom always bought Ivory soap. It didn’t smell weird, and it was inexpensive. You can get Ivory soap for about 13 cents per ounce. Necessity or decency – your call. What happens when you get to things like Lush? Depending on your preference, you’ll be paying $1.99 to $2.64 per ounce for this high-end soap – two orders of magnitude more than the DIY version. There’s no way anyone can justify that kind of outlay as “necessity,” and calling it “decency” is disingenuous.

It’s been making me think about my own definitions. How much do I need most of the things I use and enjoy? How do I justify to myself the purchases I make? I need to think harder about the choices I make. I need to make sure that I’m not buying things just because I’m being lazy or self-indulgent. I need to remember that I’m not alone on this planet, and that I need to play fair, share, and leave some stuff for others.