They hurt for about a 2 weeks and then it stops hurting.
No. If both are reasonable careful, there is no reason why it should hurt.
Not at all, but they are slightly annoying at first
72 hours
Nope.
No, but they are often more sensitive.
yes
In several, there are too many to list. He is a fighter, he gets hurt all the time. He gets hurt in the very first episode to give an idea.
If you are a woman it might hurt the first time but after that it's not supposed to hurt. If it does something is wrong and you might need more lubricant or go see a doctor.
Your muscles weren't used to it and you grew some
yes it does hurt when you get your braces fixed. Its just like getting your braces put on again for the first time.
It doesn't really hurt, but gives an awkward and most likely unpleasant feeling when it goes in. After that, it will feel good.