Mexicans shitting in the fields
It is interesting that you say this. When I was young boy (8-9) I was bad about not washing my fruit. I got lectured to by my mom and grandmother. One day my grandmother caught me eating a strawberry (unwashed), She then explained to me that the Mexican field workers would go to the edge of the field and urinate or defecate. No paper, no mashup facilities. Then they went back and picked that very berry which I had just eaten. That explaination took root in me and now I always wash my fruit....excessively.