The scene opens with three friends around a table eating Maltesers, with disabled actress Storme Toolis playing Jo, who is relaying a story about her new boyfriend.

She says they had been hanging out when things started "getting a little frisky."

"My hands may have been wandering slightly. And then I start having a spasm, which he misinterprets," she says.

Then she gesticulates with her Maltesers packet, and as a result her chocolates spill all over the table. No prizes for guessing what she's miming.

She then quips: "He wasn't complaining."

And her friends reply: "You're so bad."

With Storme joking in return: "That's what he said."

There are two further ads to come in the series - one about a wedding-themed mishap involving a wheelchair and the bride's foot, and the other about a hearing aid that goes missing thanks to a new dog.

Let's hope this is the start of a more consistent number of adverts featuring disabled people in key roles.

As the behind-the-scenes video for the ad series reminds us, 12 million people in the UK are disabled - or 20% of the population. "And yet we're largely invisble," notes Rosemary Frazer, campaign manager for disability charity Scope.

“Brilliantly filthy”: new Maltesers ad aims to break the taboo surrounding disabled people and sex