Start early .
As early as two years, teach them about body parts and use proper name. Many sigh away from mentioning the name of the private part, let your child know why it is private, teach your child to wash her private part by herself as early 2 or 3 years. Don’t allow maid of opposite sex to be washing your kids private parts. Shorn laziness and be up to your duty
It may be a wrong signal though some do it innocently, I mean calling baby ‘ my wife or our wife’, Mothers frown at it and teach your child that she is not anybody’s wife.
Explain that people also have sex because they enjoy it and it feels good.
If they ask about same-sex relationships, tell them that some people have sex with people of the same sex.
Use age-appropriate materials, such as books and pictures to explain better.
Keep language simple and honest
Explain things at a level that your child can understand. A six-year old won’t want a long explanation of ovulation, although he might be fascinated to know that women have very small eggs (or ova) that can make a baby. Your child doesn’t need you to be an expert
Be free and answer their questions appropriately. She needs to know that she can ask you anything she needs to. If you don’t know what to say, tell your child you’re glad he asked, that you don’t know how to answer, and that you’ll look for some information and get back to him. And then make sure you do get back to him. Or you could suggest looking for information together.