Why do humans and animals like it when someone strokes their skin or their hair?

Añadido: 2026-05-25

[00:00:00]Hidden inside your skin are nerves with exactly one job. They do not measure pain or heat. They fire only when something moves across your skin at 3 to 5 cm per second, the exact speed of a gentle stroke. That signal goes straight to your brain's emotional center. In under a second, oxytocin releases, cortisol drops, heart rate slows. Touch chemically tells your brain one thing, you are safe. You are not alone. Every mammal on Earth has these fibers because for millions of years contact with your kind meant you were inside the group and the group [music] meant survival. Your body does not tolerate touch. It needs it as proof. Follow for more. Drop your question in the comments. Next video might be yours. [music]