The relationship a child has with his or her parents is an example of a voluntary relationship.

No it’s involuntary unless they are adopted at an age where they understand but even then it’s not a choice.

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other.