They're horny.
The same way you make a guy's nipples 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.
It means they are homo's
You are possibly pregnant
It means you're horny or have chills.
Nipples that are really hard are referred to as being taut. They can also be called stiff or hard.
Yes, they do.
Hard.
NO. If you wanted a guy to do it and got an erection because you felt attracted to another guy then yes. But, I guess your talking about with a woman and so no because nipples are sexually stimulating and so would only bring you pleasure as long you are attracted to the woman doing it. Hope that helps.
Genetics,,, I once had A girlfriend that had nipples that were undetectable without your eyes.
We don't. They get hard when it's cold or some women get hard nipples when they are aroused. Same reasons some men have it actually.
No, it doesn't. It means you are horny or you're cold, or you want to have sex or masturbate. It's normal.