“The eyebrows are the punctuation marks of the face.”
“Yes, librarians use punctuation marks to make little emoticons, smiley and frowny faces in their correspondence, but if there were one for an ironic wink, or a sarcastic lip curl, they'd wear it out.”
“smoking had come to be an important punctuation mark in the long sentence of a day on the road.”
“I want to change my punctuation. I long for exclamation marks, but I'm drowning in ellipses.”
“...punctuation marks are the traffic signals of language: they tell us to slow down, notice this, take a detour, and stop.”
“Hundreds of butterflies flitted in and out of sight like short-lived punctuation marks in a stream of consciousness without beginning or end.”