I am a Pediatrician, and have work in a ER for almost 30 years. A few days ago I got an hysterical mom, crying, shouting etc.... Her problem was that her 5 years old son as a gesture of farewell in the kinder garden kissed another boy in the lips. I tried to calm down her, saying that at this age the boy have not gender identity and a lot of more gibber-gaber. The true was that I never got training in these themes, but I wanted to avoid an aggression to the kid and belittle the importance of the episode. Now I want to listen an expert in the area.