Know-how jokes

The sky never changes color, but when it does, we know how your breath is increasing.

How does a fish always know how much they weigh? -- Because they have their own scales.

A cop stopped a guy for speeding.

He said, "Do you know how fast you were going?"

"I was trying to keep up with traffic," the guy replied.

The cop said, "But there is no traffic."

And the guy answered, "That's how far behind I am."