There are approximately 100,000 hair strands on a scalp, and attached to each one of these are tiny muscles called arrector pili muscles—muscles tied to your sympathetic nervous system that trigger your involuntary reactions, like fight-or-flight. If you’ve ever felt like your hair was standing on end when you were really cold, then you’ve felt those muscles.
Wrapping a lock of her hair around your finger and pulling gently will stimulate the sensitive nerve endings in her scalp, sending the tingling pleasure down her back, says Kerner. You will want to start off gentler, closer to a scalp massage than intense hair-grabbing passion. As things heat up and her arousal causes her body to release endorphins, her pain threshold will increase and you can become a little rougher.
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