Seen last week: a man feeding his infant nephew while his four-year-old daughter climbed up in his lap with a toy bottle of shampoo. She pretended to daub shampoo onto the baby's head and then rub his hair softly while he lay eating. She did that three times while her father and I watched. The look of love in her father's eyes was so intense I had to look away, as though I were witnessing something too beautiful for this life.