A childhood belief about reproduction

My daghter got very curious about how babies get in the mommys tummy. She was not satisfied with the safe answers I was providing. So I gave her a slightly technical but edited version of how it startes to grow in the mommy. I told her mommys have very small eggs inside them, and that daddys put a lot of very small sperm inside the mommy that have a race and swim to the egg. Who ever gets there first goes in the egg, and startes growing into a baby. She seemed satisfied with the answer. I asked if she had any questions and she replyed No. about a week later we were going to the store just me and her. She was very quiet and I asked her what she was thinking. She said," Moma does sperms got faces?" I replyed "No honey why?" She then asked me how they know how to get to the egg if they can not see where they are going. I replyed, "They just know." I was trying so hard not to laugh.