word play jokes

Two students were driving on the highway. Just outside the city limits they saw a sign: "Clean Restrooms."

By the time they got to their destination, they'd cleaned 147 public restrooms.

Yesterday I accidentally swallowed some food coloring...

The doctor says I'm okay, but I feel I've dyed a little inside.

If you replace 'W' with 'T' in "What, Where and When..."

You get the answer to each of them.