My daughter Emily and her father Michael had a nightly ritual of giving each other a goodnight kiss. They would kiss each other on each cheek followed by a kiss on the mouth while simultaneously making the “Mmmmmwah” sound. My daughter would start laughing hysterically as I would walk her to her bedroom to tuck her into bed. As our only child, she was definitely a Daddy's girl.

As she got older, she decided that she was a big girl and thought that their kissing game was for kids. From that ...