They both begin a trip at the post!
Dear Reader"
Smallpox
A dun-GIN keeper. Edit: You have my permission to post this on r/dadjokes
Because dogs can't whistle. (X-post from r/dadjokes)
A: Capital letters.
Post office.
Eiffel.
He wanted to find Pluto !
Because bad news travels fast!
They both came in a little behind.