My sex aid classes didn't teach me anything when I was younger. So I know that we should always practice safe sex. But my question is this, if I don't plan on being pregnant and also not wear any protection I gotta be ve aware of my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period calendar</a> I can say. So how long in average sperm stay in your body till it dies and when does ovulation occurs ?