Life In 19x19

Thanks everyone for the answers.

I was always told that when you are black you should play your first move there as a sign of respect. But there is someone who when I play them they start of by immediately playing and threatening my stone as opposed to taking another corner because they say they feel like I invaded there side of ...

Thanks

I am still kind of new to the game and all so I was wondering after you put the handicap stones on the board does black play his first move or does white go immediately after they handicap stones are placed?