Why do when i flex it hurts

This soreness is a result of small, unharmful "tearing/stress" on these unused muscle fibers. As the body repairs these small tears, muscles become stronger. Short-term muscle soreness is a healthy and expected result of exercise.

Communication. releasing emotions/feelings to someone you know you can count on. ; ) someone who may not understand but willing to listen.

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.