How to talk to your kids about sex

If you don't talk to your children about sex, it won't be long before someone else does. But how honest should you be, when should you start explaining it and how much should you tell them? Maggie Dent talks to GP Dr Cindy Pan and sex educator Cath Hakanson about what to say and how to say it when it comes to sex, relationships, consent, pleasure, bodies and porn.