If you rephrase it as.... (I think you may mean this instead...)
Does a photographer NEED to give you any of the pictures?
a) No need, becoz he owns the rights to ALL the pictures.
b) Becoz of a), he is also not obliged to give out any pictures.
c) Even if he does give you a shot, he reserves the rights to it. i.e. you cannot sell 10 copies of it for 50 cents each.:bsmilie:
But if you ask WHY does he want to keep it all?
Then the answer would vary from photographer to photographer. Although I imagine if you ask nicely, then you should at least get one or more shots. But still its up to the photographer.
Yes, actually I am asking WHY does he want to keep it all
I understand he has full rights to the photos.
Some have said it's all part of "business" and the reasons need not be shared, so err.. :dunno: