No. It's painful.
Everyone is different. When you are young your nipples may be hard a lot of the time. As you get older your nipples tend to become hard only when you are cold, wet or sexually aroused.
Yes, when a female is feeling sexually aroused, there nipples will start to get 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.
Well, your nipples swell when you get aroused or cold. But apart from that, there is no permanent way to increase the size of your nipples.
TWEAK UM! When a woman is aroused her nipples harden. OR you could always turn down the heat cold nipples=hard nipples
It is common for some men to experience erect nipples when sexually aroused, as this can occur due to increased blood flow and stimulation of the nerves in the nipples. However, there is no specific percentage available as this can vary greatly among individuals.
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.
Penis (in men) Clitoris, nipples (in women)
Depends what you do with them and how sensitive she is. Some have soft nipples and others hard. Contrary to what many believe, the nipples does not have to be stiff when she is aroused.
It makes no difference, It all depends on the individual that owns them.
because of the constiction on blood vessels around the nipplles
Girls can physiologically get an erection (their clitoris contains the same type of erectile tissue that is found in the penis) when aroused but whether they get aroused by a kiss depends on the girl. Not everyone is aroused by the same things.