system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does swiss cheese have holes in it? Does it have to do with how it's made it is it just a gimmick?
gpt
During production of the cheese, the bacteria consumes lactic acid and produces carbon dioxide. The carbon dioxide gas forms the holes.

Or for a real ELI5: Imagine you're swimming in a giant pool of jello with fresh fruit floating around in it. You love fresh fruit, but it makes you fart a lot. So you start swimming around eating up all this fruit and you also start to fart. Well, since the jello is kind of solid, your farts can't quite escape and the gas just creates pockets in the jello. You eventually run out of fruit to eat so you just enjoy floating around in the jello for the remainder of the time.