Designation of Organs - Organonymy

Covert stuttering is characterized by accessory features such as word substitutions, interjections, and stopping.

She was awakened by a shock, so sudden and severe that if Dorothy had not been lying on the soft bed she might have been hurt. As it was, the jar made her catch her breath and wonder what had happened; and Toto put his cold little nose into her face and whined dismally. Dorothy sat up and noticed that the house was not moving; nor was it dark, for the bright sunshine came in at the window, flooding the little room. She sprang from her bed and with Toto at her heels ran and opened the door.

If you're interested in the biological-evolutionary question, 'The Red Queen' by Matt Ridley is a very informative and clearly written pop-sci book on the subject. Otherwise I recommend the classics: chocolate, alcohol, and if you have not already done so, DTMFA.