You can simply ask your phone to show you anything you desire and there it is: any time, any place.

With the advent of deepfake porn, the possibilities have expanded even further, with people who have never starred in adult films looking as though they're doing sexual acts on camera.

Experts have warned that these videos enable all sorts of bad things to happen, from paedophilia to fabricated revenge porn.

What are deepfakes?

Deepfakes are videos and images that use deep learning AI to forge something not actually there.

This can be done to make a fake speech to misrepresent a politician's views, or to create porn videos featuring people who did not star in them.

They're made in two ways.

Using a generative adversarial network – or GAN. This is a type of AI that has two parts; one which creates the fake images, and one that works out how realistic it is, learning from its past mistakes Autoencoders are another way to create deepfakes. These are neural networks that can learn all the features of a given image then decode those features so they can change the image

These methods vary in efficacy and quality, with GANs giving less blurry results but being trickier to train.