No matter what any of the grammar teachers say, punctuation is an arbitrary matter. It should be used to make sentences clear.
If dogs could talk it would take a lot of the fun out of owning one.
Most of us aren't that interested in getting rich- we just don't want to get poor.
The English language is more complex than calculus because numbers don't have nuances.
Unfortunately, propaganda works.
By the time they're ready to be thrown away, most shoes are thoroughly comfortable