Dear Amy: I have one son and two grandsons. The older grandson, age 17, appeared at his prom wearing a full-length purple gown with nail polish to match. I privately told my son (his father) that I was concerned for my grandson’s safety, as he would be a target if he is so flamboyant. My son became very defensive and said that people can love who they want, and that society needs to get used to it.