If that was me, I would go to my child and naturally just ask if he has any questions about what he saw or heard. I have a 6-year-old daughter. I've been honest with her from the time she started naming her body parts. I didn't exclude the breast area or vagina and gave her the proper words. It was weird at first, because I wasn't taught that when I was younger. And I'd always used the funny names to describe those parts. So at first I was awkward, but at least she was little and wouldn't know why. Now it's completely normal. I WISH she would ask where babies come from (she's an only child, so hasn't had the opportunity to ask because she hasn't seen me pregnant). But I think when parents are honest and answer the child's question (don't answer a question he's not asking), and the child in turn sees that his parents can act normal and not weird and answer their questions honestly, then I think the child learns that this is a normal part of human life (when ready to take on the responsibility) and that he can trust his parents to tell him the truth. I think it goes a long way to having our children respect us more because we're honest. My daughter and I don't use cutesy names at all. Now, when she's with her dad, that's a whole other story because he doesn't agree with me. I remind him that I'm the one who took the Human Sexuality course in college, aced it (highest score in the class), and took all the related social science courses (I was a criminal justice major, and we had to take a lot of psych courses). So she can talk over at his house as he permits, but in my house the rule is we don't use other names. And when she finally asks how babies are made, I will gladly answer that question without all the details so I don't scare her.