When you see a fly on your food, do you no longer want to eat your food?

Yes. I once saw a documentary on how houseflies actually eat and the fact that they vomit on whatever they eat is beyond disgusting.

They sometimes lay eggs on food they land on

That's a shame you don't want them because they are probably really good if they attracted a fly

Just cut the section off he pooped on and continue, or microwave it after, that will kill everything.

I ate trash at some point in my life, so I really don't care if a fly sits on my food.

i keep eating, and if the fly is small enough i eat that too