Why do doughnuts have holes? Things to Ponder?

Didn't treat me right..

Another fresh posting of have you ever wondered lately?

1. Do infants have as much fun in the infancy as adults do in their adultery?
   
2. What happened to the first 6 "ups"?
   
3. Why are cows milked from the right side?
   
4. Why is it called a building when it`s already built?
   
5. Why do doughnuts have holes?
   

Feel free to add any "things to Ponder" here by leaving a comment with them!
More great postings to check out.

1. I started with nothing
2. One Of These days
3. Hungry crows
4. Rules to date my daughter.
5. IF you`re cross-eyed and have dyslexia