As we were exiting the department store, I watched one of my toddlers struggle to hold the door open for a stranger. When I explained to him that I would help him, he boldly told me, "Daddy, I've got it..." To be totally honest with you, I was amazed and curious as to why my son would struggle to open a door that was heavier than he is for someone that he didn't know.

So I asked him. "Why did you open that door for her?" He replied, "because..." (He had that look that implied that my question was a dumb question...) When I further pressed him for a more detailed response, in his... (Continued)