spits out rotten teethThat would be stupid.
That's why I brush and floss every night, and see the dentist every 6 months. Gum disease is linked with heart disease, and damaged teeth create pain. I like to be comfortable.
Though I perform routine maintenance on my life, I try to reduce the cost as much as possible, and when I spend money, I recognize and acknowledge the tradeoffs. It's a simple exercise to create a graph of benefit from lowest to highest, and start plotting things. This makes it easier to remember there are more alternatives.
From Mike Darwn's Chronopause, an essay titled "Would You Like Another Plate of This?", discussing people's attitudes to life:
Conclusion, graphs, and references in article. As usual, I recommend reading Chronopause.com as Darwin has many good articles; to quickly link a few: