Can you get your ear pierced with a 10g stretch and not get it stretched any further?
Yep, you can get it pierced with a 10ga needle. Its totally up
to you whether or not you stretch a piercing so you don't have to
stretch it if you dont want to.
Can you stop stretch mark before they start?
No you can't it happens by its self
What happens when you type?
your flanges will cramp so a stretch or message is
recommended
What happens to a spring's force if you stretch it?