Pearl Report journalist Karin Bergen has already demonstrated her knack for persuading ordinary people to be frank about subjects that are still taboo in this community with her recent programme on what it is to be gay in Hong Kong. She had to use all her powers of persuasion to get gay Hong Kongers to come on screen and talk about their lives; one only agreed to come on the programme if his identity was disguised. It is hard to stand up in a community as conservative as this one and declare oneself different from the norm, and for her next programme, she could not find anyone at all brave enough to go on camera to talk about their life. The topic in The Pearl Report (Pearl, 6.50pm) is transsexuality, an area even less understood and accepted than homosexuality, and neither of the two people she spoke to wanted to be identified. One even insisted on increasing the darkness of his/her silhouette, to ensure complete secrecy. There are around 60 transsexuals in Hong Kong who have had sex reassignment surgery over the past 12 years, available now through public hospitals. Five patients, four Chinese and one Westerner, are currently being assessed for treatment. The two brave transsexuals who agreed to appear on the programme faced predictable opposition from their families. One was packed off to the United States when her father realised what she was going to do, in the hope she would change her mind. In fact the experience had the opposite effect, and convinced her more than ever that she had to change herself. The Science of Sex (World, 10pm) has been repeated several times by ATV, and with good reason. It might not be thoroughly convincing science, but it makes very entertaining television to see how a group of researchers have come up with ways to quantify human attractiveness. One researcher travelled the globe to see what kind of female body shape was most admired, in order to see if it was really true that in different cultures, more pneumatic shapes are more desirable. Another compared hundreds of face shots of famous beautiful people, including film stars like Tom Cruise and paintings, and reduced beauty to a formula for eye size, nose and mouth. Another has spent years working out how facial features correlate to the number of sexual partners a man can expect to have. It is not clearly explained who benefits from this kind of scientific discovery, except perhaps plastic surgeons, and they don't need any encouragement.