It's something about his hair... is it fiberglass or steel? :) Just kidding. Great exposure and focus. The difference in expressions really makes this image interesting.
I like her expression. She is scared!!!
The concept expressed in the title kind of fits the challenge...but this is a photo contest, and the image by itself does not transmit a mutually benefitial relationship. I have some issues with the processing: wb looks off, reds are over saturated and the bg is a way overexposed. These issues could have been solved under advanced editying rules.