Private Parts are Private, not Secret.
1. Use proper anatomical terminology for body parts: Penis, testes, vulva, vagina (Quick anatomy lesson: “Vulva” refers to whole area commonly referred to as a girl’s “private parts.” “Vagina” refers to the specific opening within the vulva. Of the two, “vulva” is generally the more useful and appropriate, unless you’re talking about where babies come from.) Using the proper words from the very beginning will allow you to become comfortable using them and hearing them.