Daughter asking about the baby

So I had to go to my first appointment to fill out paperwork and listen to a women for two hours about how it is to be pregnant.  Sucked but having Tricare (military) you have to attend this class every time you have a kid.  So we got done and were waiting to see a nurse to go over the paperwork.  I was the only women in there with a child already, so it was funny seeing the women watch Skylar.  It was really quiet in the room and Skye proceeded to ask me, Why do babies go into the Vagina and then they come out of the Vagina?  Why don't they just come out of the Belly?  Now all the women in the room are like OH MY GOSH, what are you gonna say to her.  Being me I don't lie to Skylar or call things by fake names, a vagina is not a whoo hoo or vagaga or whatever other weird names people come up with, it's just a vagina.  All the mom's thought I was crazy for not saying a fake name for it, one even said I can't believe she actually said the real word and I don't even say it.  So I explained that babies are made between mommies and daddies and then the baby forms in the mommy.  Then when it is done growing and ready to be in the world, she butts in and says the mommy pushes really hard to get it out, HAHA!!  You should have seen the moms to be faces.  I thought it was so funny but I just feel that if my child can talk to me about things then isn't that AWESOME.  Most kids don't talk to their parents because they are so embarrassed to talk about embarrassing things.  So after all that is over, this dad said wow she is really smart, how old is she?  I said only 6 and he said I hope to be able to be open with my kid like you are.  It made me feel great and I felt like I am not such a horrible parent for not lying to my kid about things.  I mean I don't go into detail but I don't lie to her.  Plus, when she was 3 she wanted an anatomy book and already new about boys and girls body parts.  Parents just try not to be embarrassed about the body, we all one, and it's all the same.  Psychology teaches you that if you are willing to be open and talk to your kids that they will come to you in the future with serious things.  Just always listen to them, kids are not stupid.