system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 How do fruit flies just appear?

ELI5, Where do fruit flies come from? You have fruit that is between the over ripe and rotten stage and BOOM, 10,000 fruit flies. How did they get into my house?
gpt
The fruit fly momma laid the eggs on the fruit before it was picked.  The eggs hatch when the fruit is over-ripe.

If you had eaten the fruit you would have eaten the fruit fly eggs.  This is perfectly normal, there are bug eggs in many things.  If bug eggs made us sick we would have never made it as a species.  Washing the fruit helps wash the eggs off.