No but it will be in pain for a bit and may get infected (which is more serious and will need veterinary treatment). If you are not good at cutting your dog's claws then you should take it to a professional dog groomer or vet to have this done.
most dogs do
No.
dogs
You could cut a small dogs nails with human nail clippers. Larger dogs nails would not fit inside the clipper so it wouldn't work. It is better to buy a set of clippers made for dogs though. They are made specifically for dogs nails and will work better.
they are called nails
your nails and hair
If you're nail starts to grow over your skin or one a week it all depends on the speed your nails grow at.
All breeds may have black nails. Usually, dogs get black nails when they are not take care of properly.
That depends on the length of the nails and how much it hurts when they stand.
That depends on how clean you are and how clean is the dog, and in what environment each on of you moves. Yard dogs will have more microorganisms under the nails than a clerk, but a gardener will probably have more than a dog living in a flat.
Why does anybody chew their nails? Maybe he/ she is nervous.
No. Dogs cant dig through plastic if they do they will break their nails and bleed to death.