My aunt got me a big wooden bowl in college and I was poor so I ate popcorn out of it. I noticed the popcorn tasted weird for quite some time. I finally put two and two together when the coating had all come off the bottom. The hot popcorn and oil had been removing the God knows what shiny finish and I had been eating it. :(
Paraffin wax (chocolate), polyethylene glycol (toothpaste), vanillin (vanilla flavoring), benzaldehyde (almond flavoring), and the plastic coating on medicine pills are all derived from petroleum.
You've likely been eating or using food grade petroleum products your whole life.