When my oldest son was about 8 months, he started to play with my hair while he nursed. At the time, I thought this was cute. Three and a half years later he still likes to play with my hair whenever he needs some comforting or wants to go to bed. Now, he does it while sucking vigorously at his thumb.
It's not so cute anymore! He yanks, and twirls, and pulls those fine little hairs above my neck and snags just enough to send chills running down my body followed by a loud Ouch! I don't like it when you, Big Brother do this anywhere. To quote Dr. Seuss - Not in the chair, or on the couch, not in the bed, or while eating bread, I don't want my hair pulled anywhere! I don't like my hair pulled Big Brother you are. Oh ya, and don't forget to mention this to Sam the Bee. He has mastered the art of hair pulling at the tender age of 11 months.
Disclaimer: In no way am I really trying to imitate Dr. Seuss. I am not that good.