Why not have all the apps he wants. I know I've downloaded some apps because they were free in the hopes that they sometime upgrade them to be more useful and I have a bunch of game apps that I download on the touch that aren't on my iPhone and vice versa. Besides, it's his computer not yours.
So you have 1 in 7 of every single app available in the store? Not only is that hard to believe, it is just plain stupid. If you review them or something, I could see that, but delete, man, delete!