system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why you blow on a flame to make it bigger and you blow on a flame to put it out. 

Yes I am high, but I am still asking :)
gpt
When you blow on a flame gently you add more oxygen to the fire which makes it burn hotter.

When you blow on a flame hard even though you are adding more oxygen, you are also cooling down the flame because your breath is relatively cold. If you get it cold enough quick enough it stops burning.

Its basically the fire triangle, you're adding oxygen, or removing heat, fuel remains the same.