Anywhere you like, if you prefer to avoid sticky fingers.
Because the Knife was created before the Fork.
Fork and knife
If you are out in a restaurant then you should eat chicken with a knife and fork. You can use your fork to pull the meat away from the bone or, cut pieces of the chicken with your knife and then use your fork to eat it. If in a high end restaurant you do not pick chicken up with your hands and eat it as that is not etiquette, but if you are at a family orientated restaurant this is acceptable.
Because who ever touch the fork or knife had a disease
Fork on left and knife on right. If you have lots of courses you work from the inside to the outside. You would have a smaller fork for starter then work outside for the rest.
twist the pasta around the fork or knife and then stick the whole thing in your mouth.
A knife is a wedge.
You put your knife and fork side by side across the plate.
Italian people are no different than anyone else and yes, they do use a knife and fork and in some cases use a fork with a spoon to twirl their pasta around the fork so it does not splatter everywhere.
With your fork and knife.
Knife and fork
with a knife and fork