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An inventor has designed a sex robot that caters to mens' needs by responding to the horny user's grunts and groans.

The “male-oriented sex paraphernalia” is fitted with a microphone and an analyser which “determines the intensity and frequency of the audio signal”.

Lusty men are invited to place themselves inside a “hollow tubular body” which can be fitted with various “modules” to change the sensation depending on personal preference.

The robot then analyses the man's groans of pleasure and excitement and tailors its rhythm and vibrations in response.

(Image: Getty)

Kinky designer Wai Kin Yeung said he believed his device would be a sucess.

He said: “The sex paraphernalia market is huge and ever expanding.

"In the past few years, related businesses in US are estimated to gross more than USD 15 billion annual sales.

(Image: Wai Kin Yeung)

“Despite the enormous market potential, most of the sex paraphernalia available nowadays are female-oriented and, no doubt that, the need of male are greatly overlooked.”

Yeung has been given a patent for the design and imagines releasing a range of "modules" to go with the robot.