Yes it is suppost to be hard because womens have to touch mens nipple.
womens nipples are big and pointy.
Put ice on them.
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
Flick them very hard You will jizz...............every where
If it is he's sucking too hard. Womens nipples are more sensitive then mens.
you can tell,the womens foot will both turn inward,hard ,erect breast nipples,they wanna have sex
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.
Ice...or cold objects
coming from a womens perspective, no. Its just the saggy ones that's unattractive!