Some bugs are in our food because, well, we put them there. If you think it's fruit that turns this strawberry yogurt red ... this is a very specialized, you have to farm these little bugs ...

An curved arrow pointing right. Cochineals are tiny bugs that live on prickly pear cactuses. The acid in their guts makes a red dye used in textiles, cosmetics, and foods like M&Ms and Yoplait yogurt.