Why don't some women's nipples go hard when they're being intimate with someone?

is it normal if you hardly have any nipples, meaning that it's really flat...???

I can be sitting there and my nipples will suddenly go rock solid and poke through my t-shirt, what does it mean, how and why...

I am not feeling very good and I am really confused about this period. I am not on my period but I am on my period it is not ...

Why do doctors leave the room when you change? They're going to see you naked anyway?

Why do your nipples get hard when you get cold??

Right when your young and you first start developing, you get like grape nipples don't you? But then when you get older does ...

Its been 4 days now and my left nipple is some what hard and sensitive at all times. Am married could I be pregnant. What can...

My nipples have been really hard and sore for about 3 days now. Also yesterday I noticed a lil bit of brown discharge in my u...

well im 5 months pregnant and my nipples are ALWAYS on hard no matter if im cold or not. My breast dont really hurt right now...

it feels like I am letting very 1 down when I get yelled at for doing my best or I want to be alone. how can I get rid of the...