In baking, why must one fold a mixture in and not just stir it?

[kaylasdad99]

@Inner_Stickler

Frankly, in my experience, the 99 cent angel food cake mixes make a perfectly delicious cake and then you don’t have to fuck around with a shit ton of egg whites. Nothing pisses me off more than seeing a cool recipe call for 8 egg whites. Use the whole egg or fuck off, you silly recipe!

That’s why I always preferred to make a chiffon cake. The recipe called for you to use those egg yolks in a batter that got folded into the beaten egg whites.