Ain't it the truth!
A boomerang is a good example of parental love. As each of our children (5) reached the age of independence, we "set them free". They went to college, their own apartments, jobs, whatever. Each one came back. You could say we'd failed. We called them our boomerang kids. After a time, when it seemed they were ready, we sent them out again. This time they didn't return.