While traveling between towns, they show you things like this.

Thanks to the track from the video (it's really cool), I learned about a South American beverage called chicha with a very peculiar way of making it:

Women chew bread made from cornmeal, saturating it with saliva. Thanks to the enzymes present in saliva, starch is converted into sugar, which promotes fermentation. The alcohol content in chicha ranges from 1 to 6 percent, depending on whether the drink is being made for everyday use or for solemn religious festivals, such as Inti Raymi.

I'm not sure I'd want to try something like that.

// youtube