It's important that you have a good idea of what's normal sexual behaviour and can also spot the warning signs if something might not be quite right.There are 4 phases of childhood sexual development.Childline has information for young people about pregnancy, STIs and contraception and safe sex. It's important to talk to children and young people about consent.Sexual consent means being able to say yes and agreeing to do sexual things or have sex.

So, don't be too worried if your child doesn't act exactly as you'd expect.

"One of the things we see with happy couples is that they know their partner's differences, and have pretty much stopped trying to change the other person," says Darren Wilk, a certified  Gottman Couples Therapist with a private practice in Vancouver, British Columbia.

"Rather than trying to fight their partner's personality style, they instead focus on each other's strengths."  RELATED: 40 Ways to Divorce-Proof Your Marriage" title="marriage" src="data:image/gif;base64, R0l GODlh AQABAIAAAAAAAP///y H5BAEAAAAALAAAAAABAAEAAAIBRAA7" data-src="https://hips.hearstapps.com/rbk.h-cdn.co/assets/17/08/rbk_web_improvemarrriage01.jpg?

Children with developmental delays may not stick to these age guides.

If you're worried about anything you should speak to a health professional about it.