system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:How is it that sperm and eggs can be frozen for years to be used later but we can't freeze a living person without killing them?
gpt
People, like strawberries, are huge and soggy and fragile. If we try and freeze them, the water inside starts growing bigger, which pops loads of the little balloons that we huge things are made of. Some of those little balloons are really important, and if too many of them break, the strawberries turns into mush.


Tiny things like human sperm and eggs don't have much water in them, and they are small enough that we can freeze the whole thing at once.