Why does the human nipple stick out when cold?

Answer 1

the skin contracts to keep all the heat in your body and keeps you nice and warm - like big goosebumps..... x

Answer 2

the skin does NOT contract... I mean, do wrinkly people get less wrinkly when they're cold?

NO


The CORRECT answer is that the normal nipple size depends on how much blood flows through the capillaries underneath the skin. When you're cold, the capillaries close off, reducing heat loss.

For a female, this effect is emphasized.

When they're horny, tons of blood goes to the nipple, therefore they seem puffy, when they're cold, the blood rushes away from the aureole, so that in comparison, the nipple seems to extrude farther out.

Answer 3

It's the same process as goosbumps, the skin protrudes across the body to increase surface area so that more heat can be absorbed.