Whenever they want. Not all women do though.
Nope. That's a personal preference. They don't have to, but (not to be rude) some guys don't like the bush. ANSWER: Agreed, no requirement for a girl to shave. But, what shaved girls learn is that...
Carefully
Yes. Usually with a bikini razor. yeah some do some don;t
because they want to get laid. and it's cleaner