more blood comes to the surface of your skin to try and keep your body warm and heat up the muscles around it. this rush of blood causes the nipples to become hard
on both men and women.
Uhhh, that you're cold...
Nipples can get sore due to cold weather.
No. Nipples will harden as a reflex when they are stimulated or cold.
Genetics,,, I once had A girlfriend that had nipples that were undetectable without your eyes.
Your cold, have weird nipples or your turning into a warewolf ;)
Its cold!
your nipples often swell up when you are cold, and often tickling them helps
Becuz were cold!! =p
because your in the freezer! look around you!
no
Everyone is different. When you are young your nipples may be hard a lot of the time. As you get older your nipples tend to become hard only when you are cold, wet or sexually aroused.
TWEAK UM! When a woman is aroused her nipples harden. OR you could always turn down the heat cold nipples=hard nipples