Why do your nipples get hard when you get cold?

Why do your nipples get hard when you get cold??

Answer #1

To keep heat in. x

Answer #2

When it’s cold the skin of your nipples contract to decrease overall surface area and better conserve heat.

site:http://www.associatedcontent.com/article/2210465/why_nipples_get_hard_in_the_cold.html?cat=52

Answer #3

they also go hard or erect when you are aroused its normal and its just part of what the human body does

Answer #4

how does that work?? how does your nipples getting hard keep the heat in??

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