Can’t unsee that ... Robyn Millen was forced to show her dad how Snapchat works after he shared a photo of himself in the bath that was intended for her mum. Picture: Supplied

The Telegraph reports that the pair, from Brighton in the UK, have attracted attention from around the world after Ms Millen’s dad posted an image of himself naked in a bath with just a few emojis covering his private parts.

“Happy valentines. Xxx” he wrote in a message intended for Ms Millen’s mother.

However he unknowingly uploaded the image to his Snapchat Story, which all his contacts can see, instead of sending it as a private message.

Ms Millen tweeted an image of the awkward conversation they had after the mistake.

“Dad, your Snapchat was so inappropriate,” she wrote, prompting an apology from her old man.

“Sorry, thought I only sent it to mum!! Lol. Xx,” replied Ms Millen’s dad, before admitting: “Don’t know how it works.”

The dad, who is not named in the series of tweets, later responded “hahahaha” and “so f***ing what. Nothing to see apart from my legs and those emoji things.”

Ms Millen’s original tweet has now been retweeted thousands of times. She has also taken to Twitter to reject suggestions that the photo and the conversation with her dad were not genuine.

It comes as the UK government found that Snapchat and other social networking sites are encouraging teenagers to send “sext” messages and look at porn.