The gift he had brought for me was a delicious cheeseburger.
He gave you a cheeseburger as a gift?
Because he knew that I really adored cheeseburgers.
It is good to buy someone their favorite food. Thus you should be happy when someone buys you your favorite food.
I wasn't expecting him to bring me a cheeseburger, because he knows how to make normal food himself.
Surprises makes relationship better and more spontaneous.