It is possible you could have testicular cancer. If you get it a lot and you are between 40 and 150 you should consult ur doctor.
is it normal for dogs to have 4 testicles when they start to play
Nowhere can I find the article I need for class tomorrow.
nowhere
That's normal at the very start of puberty the balls grow and start producing hormones which make the rest of the body changes of puberty
Yes. They'll start hurting before you start.
1
Your head will start hurting frequently.
Nair, nowhere
Nowhere . . . it is a closed loop with no beginning and no end.
This is normal near the start of puberty. As it progresses the penis will start to grow longer too. Growing pains are felt in the testicles which come and go as a dull pain. If you are having severe pain then it would be worth seeing a GP as soon as possible.
A bee sting will start hurting immediately.
I would start by approaching the topic of having children, and explain that you are not able to father children. I wouldn't start with the anatomy part, because there is always the possibility that you can have artificial testicles put into your scrotum. So if she is bothered by the esthetics of it talking about no testicles right away might be harder to deal with. Just find the courage to do it. Why wait? Eventually she will figure it out.