DUMB Questions Part 4!

What is a "free" gift? Aren't all gifts free?
What makes cheese so confidential that we actually need cheese shredders?
Whatever happened to preparations A through G?
When cheese gets its picture taken, what does it say?
When cows laugh, does milk come out of their noses?
When they first invented the clock, how did they know what time it was to set it to?
Where are the germs that cause