I think Dad has mentioned this too. Sometimes, Alice really, really likes to have her hair combed. Recently this has been at night. One way to get her to lay down is to start combing her hair. If you stop before she is completely asleep, she will angerly whap her head to indicate that you should continue. But if you keep combing, she will eventually drift off to sleep.
The boys never much liked or disliked having their hair combed. I think it is a hair length thing. They have always had short hair, so they wouldn’t feel the tugging of the comb.