How old were you when you learned the ';Birds and the Bee's';?

My parents never talked to me about it and my husband's parents never talked to him about it and we both learned in sex ed class in middle school. My husband recently talked with our 10 year old son about it. He didn't go in to major detail.How old were you when you learned the ';Birds and the Bee's';?
3+. Junior division in Marina International School, Banjul.