Aircraft mechanic Michael Harriman claims to have created the world’s most sophisticated robot sex doll.

The sex androids have “hearts” that beat harder during sex, breathe harder and have internal heaters to raise the body temperature – but their feet stay cold “just like in real life”.

The basic Andy dolls are sold for £4,000, with extra charges for adaptations like extra large breasts.

The model can also be made to move by remote control, wiggling her hips under the bedclothes and making other suggestive movements.

Harriman said his design was an improvement on the popular “real dolls” sold in the USA.

Via Ananova.