system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How are flies able to navigate through the tiniest openings to get into my house yet can't find their way out through an open front door?
gpt
There are trillions of flies outside zipping about in random directions. The odds *one* finds a way into your home are pretty good.

One fly in your house zipping about in random directions has a much, *much* smaller chance of finding its way out. Especially since they travel by sensing light, so windows are the ultimate trick.

Also, your home is cool and out of the sun. With lots of tasty trash. Would you be trying to leave?

Also also, observer bias. The fly may escape while a new one enters...can you tell the difference? 

In other words, just because *someone* won the lottery doesn't mean you will!