CHINA - Pederasty, the erotic relationship between a male adult and an adolescent boy, was already prevalent around the time of the Yellow Emperor, who is credited with having founded Chinese civilization. At least, this is what various literary works have recorded through the ages.

In both folk myths and literary classics, there have been both brief and lengthy descriptions of same-sex relationships, for both genders.

Sociologist Pan Guangdan insists homosexuality is a natural fact of life, and that it must have existed much earlier in human history.

While translating British psychologist Havelock Ellis' groundbreaking Psychology of Sex in the 1930s, Pan was inspired to search through historical documents for credible clues of the existence of homosexuality throughout Chinese history.

And he found plenty.

His research is compiled as an appendix in the Chinese edition of Psychology of Sex, making it arguably the first systematic study of same-sex relationships in China.

According to Pan's study, the earliest mention of homosexuality was in the Chronicles of Shang. Minister Yi Yin of the early Shang Dynasty (c. 16th century-11th century BC) set out punishment for "10 criminal acts" among officials. One of them was pederasty.

But Pan was surprised to find that in the Zhou Dynasty which followed (c. 11th century-256 BC), a widespread proverb went like this: "Good-looking males can distract emperors from the wisdom of old intellects".

Therefore, he believes that during the Shang and Zhou dynasties homosexuality was common.

Historical records of the periods provide vivid and detailed accounts of same-sex relationships, especially in imperial bedchambers.

Stories of romanticised gay love are often retold, even today, as people attempt to justify homosexuality.

The earliest such story, recorded in the Spring and Autumn Annals, is the Pleasant Hug From Behind. When Jinggong threatens to kill an official who often looks at him, the sage Yanzi tells him it is wrong to kill someone who "admires your beauty". Appreciating what Yanzi says, Jinggong lets the official "hug him from behind".

In the Han Dynasty (206 BC-AD 220), historians Sima Qian and Ban Gu both included reports on ningxing, the emperors' male concubines.

From these, Pan concludes that almost every emperor during the Western Han Dynasty (206 BC-AD 24) had or was suspected of having male partners.

The best known among these was Dong Xian.

It is said that Emperor Ai woke up to find the sleeves of his imperial robes tucked under the sleeping body of his partner Dong Xian. Not wanting to wake his beloved concubine, Ai sliced off his sleeves, and hurried off to his day's routine.

From then on, same-sex love between males has often been referred to as the "sleeve-slicing affection" - a euphemism for a gay relationship by those who still find it embarrassing to publicly address the topic.

By the Jin Dynasty (1115-1234), homosexuality had become a common practice among the upper classes and is frequently mentioned in official reports.

Pan says this is understandable as the Jin was one of few eras in world history when men were particularly attentive about their appearance. Pan says the other period was in Ancient Greece, where pederasty was an accepted part of life.

"Ancient Greek philosophers viewed homosexuality as more sacred than heterosexuality Without relevant literary references, we can't tell whether ancient people thought the same way, but it's obvious homosexuality during this time was free from excessive social prejudice and moral condemnation," Pan says.

In China, soon after the Sui Dynasty (AD 581-618), homosexuality gradually disappears from official records and Pan refers to novels and other casual references, the authenticity of which was often in doubt.