If you want to make her nipples hard play with them use the tip of your tongue around her orioles or a piece of ice and for sure they'll get hard
Genetics,,, I once had A girlfriend that had nipples that were undetectable without your eyes.
The same way you make a guy's nipples hard.
Yes, indeed they are.
Ice them
Impossible
Flick them very hard You will jizz...............every where
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.
Maybe if used externally.
I am a women and personally, If u don't do it that hard, I like it. I dont know about other women. If you are gonna bite her niples, please be gentle!
Nipples that are really hard are referred to as being taut. They can also be called stiff or hard.
Yes, they do.
Hard.