A childhood belief about reproduction

I come from India, where talking about sex is considered highly taboo. In my school, there was nothing called sex or health education. So when I moved to an American school in the 6th grade, I was shocked to hear the other kids (who were quite half-knowledgable) talking about periods and sex, which I had never heard of or even wondered about before. Being an only child, I didn't even have to face the question of where do babies come from. Tired of being teased by my peers, I went to the library and took out a book for kids, which showed the biological process of the sperm meeting the egg and the cycle of ovulation. I still didn't get the sex part, and thought that when things got hot between a couple, the sperm (which I assumed to be the tiniest-- as mentioned in the book-- little invisible dust particles) jumped from the man and into the woman's body to impregnate her!! I had no clue about the vaginal hole either!!