Most do, but not everyone's.
The same way you make a guy's nipples hard.
It means you're horny or have chills.
Because you're horny?
OK first of all I wanna kill the myth that womens nipples get hard when they're horny - they don't. Second, we don't want you to know! That is one of the perks of being a woman - we can enjoy it in peace without anyone medling. Maybe you can see her get more red around the cheeks but we can hide it.
To make your nipples hard, you need to sexually stimulate yourself. Massage your boobs, rub them, squeeze them, etc. Also, flick, lick, and touch your nipples as much as possible. Your nipples will get hard once you're horny and sexually stimulated.
No, it doesn't. It means you are horny or you're cold, or you want to have sex or masturbate. It's normal.
when they are horny
If you mean that they are always erect it is normal and nothing wrong with you.
Flick them, get cold like in a cold pool or super hot like in a shower. Or when u are horny they'll get hard (if you are a girl)
Nipples can become erect or hard due to arousal and the release of oxytocin, a hormone associated with sexual pleasure. Increased blood flow to the area can also contribute to nipple sensitivity and firmness during sexual activity.
Play with it using you tang by means of liking around her nipple and so fort..
yes many things do touching her licking her feeling her kissing