And then it suddenly hit me.
How would you classify Prostitution?
Would you put it under Primary, Secondary, or Tertiary industries?
I mean, it should be under primary because it can be low-paying (it depends, really) and you don't need a high level of education to do so. Furthermore, it involves the extraction of something, and what else do you think they extract? That's right.
Yet on the other hand, it can be under tertiary because it services people!
So what do you think?
Primary - The extraction of materials provided by nature
Secondary - Processing of products
Tertiary - Any activity involving service or hospitality