Gift Giving

While watch the video in the past few classes, I kept coming back to the question of what a gift is? It seems the idea of how a gift was represent in the film was not how I had always though of it. In my understanding if someone gives me something as a gift, I now own that thing which was given. However, the concept in the film seemed to be one of loaning, a kind of gift with strings attached. Is this really what a gift is? and if so do we ever own them? since they must be somehow repaid. It giving a gift to we somehow own the right to gain something from the transaction later on?