Because you're horny?
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 are her nipples leaking
She may be pregnaant, if not, in heat.
It means you're horny or have chills.
A dog's nipples may swell during of after her heat cycle. They can stay swollen for up to two weeks after her heat is finished. If they stay swollen longer than that, it's time to have her checked out by a vet.
Sexual stimulation is one way, and another would be that she is cold.
She's obvioulsy drank too much Dr. Pepper xP
Its not hard at all. When in heat they should be able to get pregnant. Sometimes on their first time they don't get pregnant. But that's rare.
Possibly, but the other signs are missed periods. Take a pregnancy test soon if you have missed a period. A hard belly doesn't usually show up until about the 4th month when you start to appear pregnant.
well a beluga can stay for 12-15 months that is a long time
You could be, I didnt get sick or anything, but was very tired and mine were sore and hurt...
There is no time; it doesn't happen to every woman, just like not every women gets stretch marks.