Has your 5-7-year-old son started asking you questions about his boy anatomy? They tend to be very curious about their penis and want everyone to know about their questions. This is normal and healthy exploration on the part of your son, but make sure you answer his questions.
If your son is 15+ years old, it is time to talk to him about contraception. This encouragement is not because you are concerned that he is having sex now. It is to prepare him for his future when he is no longer at home with you. We want to make sure he is making informed decisions.
If you have a 15+ year-old son, it is time to talk about topics related to sexual maturity.
It seems natural to teach our daughters about hormones, like estrogen and progesterone, because they are part of the menstrual cycle. Changes in the levels of these hormones throughout the cycle results in a menstrual period each month and that is something every young girl needs to know about.
When you think back to what you were taught about your female anatomy, starting your first period, and issues with reproduction, there was probably a lot of information missing. Now that you have a child, it can make this a very different experience for them.