Just like every other part of growing up, some children mature sooner or later than others.
So, don't be too worried if your child doesn't act exactly as you'd expect.
It’s also a good chance to explain the differences between the things that are OK to do in public and what should be kept private.
Try these tips: Talking to your child about sex while they’re still in primary school will help you to work out their level of understanding and encourage them to ask questions.
Of course, this won't be easy for everyone, especially if your child's behaviour seems shocking or morally wrong to you. Sexualised behaviour which is significantly more advanced than you'd normally expect for a child of a particular age or which shows a lack of inhibition, could be a cause for concern.
For example, a pre-school child who talks about sex acts or uses adult language or a 12 year old who masturbates in public.
It's called #Listen To Your Selfie and includes videos and advice for children and young people.
By knowing what's 'normal' at each particular stage you can be ready for what to expect, even though it might seem a little uncomfortable at times!
The way you respond is important If you're too disapproving or imply that sex shouldn't be spoken about then your child may be less likely to come to you with any questions or worries they might have. The way you react can affect how comfortable your child will feel about talking to you about these things in the future.
As children get older, the way they express their sexual feelings changes.
There's no doubt that children these days are exposed to sexual images at a far younger age.