Yes, in a way. Its the nipples that become hard.
Yes, In the nipples
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.
A females nipples stay soft unless they get cold, the they become hard.
Nipples become darker when pregnant
The same way you make a guy's nipples hard.
Nipples that are really hard are referred to as being taut. They can also be called stiff or hard.
no, if u r cold your nipples tend to get hard. Women will most always get hard nipples when aroused and most men wont, but some do. if u r Mae and get hard nipples when aroused it doesnt mean theres anything wrong it just happens.
Yes, they do.
Hard.
Genetics,,, I once had A girlfriend that had nipples that were undetectable without your eyes.
If you mean that they are always erect it is normal and nothing wrong with you.