'Hi, your son's been watching us have sex': Porn stars turn up unannounced to tell mother her child has been watching adult films in hilarious online safety campaign

New Zealand has released a quirky ad campaign to encourage parents to have a frank conversation with their children about porn.  

The clip is part of government efforts to get parents to talk to their children about real-life relationships and the importance of consent with a sexual partner.  

The unorthodox ad shows two adults from a porn film named Sue and Derek arrive on the doorstep of a boy's house, completely naked, much to the surprise of his mother Sandra, who answers the door in her dressing gown. 

They proceed to inform Sandra that they are there because her son had looked them up online to 'watch' them.

The pair tell the mother that her young son watches them on his 'laptop', 'iphone', 'PlayStation', and 'smart TV projector'.

'We normally perform for adults, but your son's just a kid,' Sue tells the bewildered mum. 'He might not know how real relationships actually work.

'We don't even talk about consent, do we? We just get straight to it.' 

Derek agrees: 'No, and I'd never act like that in real life.' 

Sandra's teenage son then appears at the doorway looking horrified, as Sue calls out to him: 'Hi Matty!' 

But Sandra doesn't let the situation phase her as she tells herself: 'Ok Sandra, stay calm, you know what to do here.' 

She turns to her son and tells him: 'Alright Matty, it sounds like it's time to have a talk about the difference between what you see online, and real-life relationships. No judgement!' 

The humorous ad has a clear underlying serious message for parents on how to support their children as they become curious about sex. 

The ad encourages parents to have open and honest conversations with their children about what they might see online and how it differs from real sex and relationships. 

A government web page gives further tips about how parents can raise the sensitive topic with their teenage son or daughter. 

'It can be challenging to talk to your child about porn. Conversations about sex and pornography can be awkward and you might feel like you have no idea where to start,' it states. 

It then recommends that parents 'choose the right moment', 'listen to what they say', 'let them know porn doesn’t reflect reality', and 'discuss sexual consent and respect' with them.