Why do many people fall asleep when the hair is brushed or messed with?

Question

Just wondering. Pets do it too.

Answer 1

its relaxing i guess

Answer 2

because it feels good. most are not used to being touched in this way so when it does happen it puts us into a state of relaxation.

Answer 3

I don't recall this ever happening to me when I brush my hair...

OH WAIT

I think I know what you're talking about now. I guess it does put people and pets in a state of relaxation.

Answer 4

Because it has a massaging effect, and light massages relax and calm us, so we get sleepy. I remember stroking my hand through a boy's hair (short hair feels so good!)  on a long bus trip, and when I realized I'd been doing it absentmindedly for a while, he'd almost dozed off, haha.