No you do not need to be pregnant.
No transmission of std's and no sore nipples. There are more but I don't know them.
I don't recommend buying a stick on bra, as what ever substance used to stick to your breasts will more than likely leave your breasts and more importantly your nipples feeling sore. Not to mention if it damages your nipples, you'll wind up wishing you hadn't bought the bra and would have to deal with sore breasts until it heals.
pregnant
It can be. If you are having symptoms that are unusual for you around the time of your period, then yes, they can very well be signs of pregnancy. Common symptoms women notice when they are early in their pregnancies are: Nausea, sore breasts and nipples, increase or decrease in appetite, increased urination, more emotional, breakouts, and an increase in cervical mucous.
I had my nipples done 11 years ago & a friend of mine just had hers dona about a month ago. In my case it only hurt for about a week, but I am small chested. She on the other hand has more to work with & they were sore for about 3 weeks, It also depends on the type of bra (if you need one) & any "playing" with them. I have heard of people not hurting so they "enjoyed" their new toys too soon & were sore after that for a while. So maybe a couple of weeks to a month
You can squeeze and pinch your nipples and they will become more erect.
Large, erect nipples are seen as being very sexually attractive. Perhaps this comes from women finding it very pleasureable to have their nipples played with, causing them to become even more erect, and making the vagina and clitoris highly prepared for more activity, thus causing the desire for additional sexual activity, often including intercourse. Correspondingly, women's nipples may have gotten larger through time as a response to this... perhaps the women with the largest nipples were more sought after as sexual partners.
Answer With my personal experience in three pregnancies my nipples have been my pregnancy test and they would go hard and hurt and throb and almost burn for long periods off time almost to the point of me crying...i have also had it while being dehydrated and from certain medications definitely don't rule out pregnancy and get a test as soon as possible so you can be aware whether you are or not...but until then with the nipple burning a hot bath with a hot towel over your nipples always soothed the pain and usually made it end for awhileNipples usually are hard. Sore nipples can be a sign of pregnancy providing your having other symptoms too.
sounds likely, go to a doctor
Not necessarily. While I'm not a physician, I don't think that it's normal for the nipples to be sore because the breasts are growing, and there are plenty of other things that could cause them to be sore. It could be an indirect result: larger breasts might "bounce" more, causing the nipples to rub on the inside of your clothing, which could in turn make them sore.
It can. While breasts are developing and growing, they can be tender and sore, and that is perfectly normal.