Human Biology

Nipples Harden To Help With Breastfeeding (So Why Does It Happen To Men?)

The only sure reason that nipples harden is that it facilitates breastfeeding. When something hits the roof of a baby's mouth, the baby's suckling reflex is activated and it will latch onto the breast for feeding time. But men's nipples harden too. And both sex's nipples harden when aroused and cold, which doesn't fit with the whole breastfeeding thing. So what's the deal? Get as many details as we know in the video below.

Why Do Nipples Get Hard?

There are a few reasons.

Are Men And Women's Nipples Different?

They sure are treated differently.

Written by Curiosity Staff October 3, 2016

Curiosity uses cookies to improve site performance, for analytics and for advertising. By continuing to use our site, you accept our use of cookies, our Privacy Policy and Terms of Use.