Why do doughnuts have holes?

So that the dough is cooked evenly.

Think about it: if you had no hole

then the center of the doughnut would not cook as quickly as the outer edge of the doughnut

and you'd have to cook longer to make sure the center of the doughnut was cooked

possibly OVERcooking the outside of the doughnut.

With the hole

the dough is basically a circle (tube)

that can be cooked evenly and quickly from all sides.

Ask in the food section, if this is really important enough to you to post again.

Not all doughnuts have holes. 

Because whoever made them up was originally using the dough to masturbate..🌺

Because they were originally for playing ring toss on guys wangs 

Because you can put your penis and cream it