The site claims the app will also be able to dim room lights and play mood music, presumably with home automation, as well as suggest new sexual positions with the words, "OK, Glass, give me ideas".

The developer is also working on an accompanying iPhone app called Glance, which will let users switch the point of view to the iPhone's camera to see the "whole picture". After the encounter, Sex with Glass will automatically create a video from the footage on all three devices that users can view later. Not that much later, though – it self-destructs after five hours, Snapchat-style.

"We love using design and strategy to disrupt at scale. So when we asked ourselves the question: 'How can we make sex more awesome with Google Glass?' We came up with Sex with Glass," Sherif Maktabi, one of the three designers involved in the project, told London's Daily Mail.

But Sex with Glass appears destined for a niche audience within a niche audience: Google Glass isn't on sale to the public yet, and for those with access, the price tag is $US1500 a pop. This app presumes a couple has two of the device. But besides the issues of price and availability, the idea of both parties wearing an awkward headset while having sex will probably have limited appeal.

Add to that concerns about privacy. By its nature, Google Glass reduces the amount of friction between capturing and sharing; it's incredibly easy to accidentally send a photo or video via Glass to any of your networks. And although the app isn't available yet, it's already clear that Google Glass is hackable. Sex with Glass would represent the ultimate target for hackers with a peep show fetish.