First, it is good for the only child to have a sister or brother, so that the child can learn to share things. The parents are easily to focus their all attention to the only child, they want to give all the things he wants. But in the long run, they don’t realize they have spoiled their child to be an emperor. Selfishness can be found on the only child, if he has a partner, then he will realize the need to share things with others. What’s more, the parents can distract their attention, so they won’t spoil their kids