you should have them from birth, unless your name is Kyle XY
It is not uncommon for a girl to start developing at age 10, or even 8 or 9. She should start to wear a training bra, or a regular bra, depending on size, when she feels she needs one for support, or modesty to cover the nipples so they don't show.
If you're a woman, you should start worrying about it at the onset of menopause. Men do get osteoporosis, but it's much more rare.
Yes. Nipples grow larger when women start puberty... If a 10 year old girl hasn't started puberty, her nipples will be small
No, the age doesn't matter. You should just get a bra whenever you start developing.
Children typically start developing imaginary friends around the age of 3 to 5 years old.
Changes in appearance of your nipples should be examined by a doctor, whatever your age.
no. they should start driving at age 2.
Yes they do
12 years old, grade six approximately.
Your nipples should be growing as you grow, this includes your breasts. There is no exact age although usually around your early teens they should start to develop and then stop usually late teens. Although as I said there is not set in answer.
At age 15
Do you have PMS?