because your in the freezer! look around you!
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!
Becuz were cold!! =p
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
so there nipples go hard
Because cold air hits them.
Don't do that..
You can stimulate your nipples by exposing them to colder conditions (such as ice, or cold weather). You can also rub them, or pinch/bite them.