If I had to defend a total stranger and simultaneously explain the picture, I'd start by pointing out that the spare is already on the car. Meaning that the blown/flat tire has already been removed and placed in the back of the SUV, a job from which the man appears to be returning. If I had to caption the photo, it would go as follows: "Hey babe, I'm going to put the tire in the back of the truck, can you start the lug nuts on the doughnut for me?"