By the time their brother was born a few months ago, our kids understood that he had grown inside my body and that he would be born either vaginally or "through the sunroof." However, with the exception of our oldest (a fifth grader), our kids really hadn't grasped how the baby got in there in the first place. When I asked them recently, it was clear that my kids think babies are made in all sorts of hilarious ways.
As a parent, it's my responsibility to keep my kids safe as they grow. I try to share my values with them every day — empathy, generosity, respect, consent, compassion, and kindness — while understanding that some day they will have to navigate the world without me. That freaks me the hell out. So, I talk openly with them about their bodies, and don't shy away from questions, even ones that are surprising or scary, like how the baby got in my uterus, why I get my period, and what the word "rape" means. I try to be sex positive and to use medically accurate terminology for body parts and what those body parts do. I also call out misogyny when I see it, like slut shaming, sexualization of girls, and bullsh*t dress codes. I don’t want them to feel shame about their bodies, sex, or sexuality.
Since they are still pretty young, my partner and I have time to teach our children about how their bodies work and how babies are made, which in my opinion is seriously important. Studies have shown that kids who receive comprehensive sex education wait longer to have sex for the first time, experience fewer teen pregnancies, use condoms and contraception at higher rates, and contract less sexually transmitted infections, than kids who don't. Whether I like it or not, my kids are going to have sex some day. When they do (in 20 years, right?), I want it to be great, healthy, consensual sex. I want them to know how to access effective birth control and to negotiate condom use. I will talk with them about all of these things, of course, but for now it appears that the important question of the day is, "Where do babies come from? "