Well, I have to put in my two cents worth. First of all, the ball is pushing the HITCH ... but the rest of the trailer weight is being pulled by the hitch. So the towing vehicle is towing the trailer.
Secondly, I don't know which pilot said it, Ben ... but I understand it. I think it's that way for all young men, no? No matter what you are doing, you are thinking about the ladies. When you are with the ladies, you try to impress them by talking about what you do for a living.