I was just a wee bit older than my oldest grandson — who's currently 6 — when I discovered treasures in the bathroom. I recall checking that no siblings or parents were around, then slinking into the main floor bath, quietly closing the door and locking it, then climbing atop the vanity to stand and face the cabinet as my feet straddled the sink.

I'd then open the mirrored door and peruse the goodies inside. I'd open the makeup...