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I’m visiting the Guo-li-zhuang restaurant, a specialist penis and testicle emporium that caters mainly to wealthy businessmen and Communist party officials (who, truth be told, are often one and the same).

It offers every conceivable John Thomas you could ever want, which probably isn’t very many. Nonetheless, the menu is both extensive and impressive.

The place looks like a smart kaiseki ryori (Japanese haute cuisine) formal restaurant, complete with underfloor stream, separate secluded dining rooms and hushed, discreet staff. I have come determined to avoid euphemisms - we’re making a current-affairs programme for the BBC - but I’ll admit the temptation is strong.

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I ask a chef to show us the preparation of a penis first, so that I can get a feel for the process. He enters holding aloft an eye-wateringly large yak’s knob. It’s about 45cm long, but thin, so thin. It’s been boiled gently and - I can’t believe I’m writing this - peeled, except for a hunk of foreskin still clinging on to the end. He cuts the thing in half lengthways with a pair of scissors.

As he chops through the very tip of this impressive member, I feel an undeniable empathy twitch in my own penis and a bizarre feeling of nausea in my groin. (I didn’t think groins could experience nausea.) I can’t help yelping in sympathy.

He then uses a knife to make hundreds of little snips along the side of the penis and chops the strips into 5cm pieces. When these are dropped into boiling stock, they curl up into little flower shapes that are so incongruous, I can barely believe my eyes.

I ask the chef if he thinks it strange to deal exclusively in genitalia, but he shrugs and doesn’t know what to say. He’s just happy to have a good job, really. His friends don’t take the mickey, his parents are proud of him and he does what he’s told. Okay.

Less taciturn is the female manager of the place, who says that Chinese history is one of famine, poverty, drought and disaster, which is why the Chinese have become used to eating every part of the animal - they have to extract every edible morsel from the food they have.

I ask if this is good communist food, and she proudly says that most of her customers are male Communist party members. Their meal costs an average of two months’ wages for a dumpling-factory worker, and I ask how a conscientious Communist can be seen here (paying up to £250 for the rarer penises) when the average peasant is on the poverty line.

She holds her hands up in the air and tells me that they come for the virility benefits genital-eating offers. Apparently, you can go for hours after eating a good portion of penis.

We try the water-buffalo penis first, in thin shavings. It started long and thin, but someone has shredded this noble old chap on a mandolin. It has the texture of squid and tastes of the mild chilli stock it’s been poached in.