Homosexuality is still one of the world's biggest taboos. It has led to riots in Russia, huge splits in the Anglican Church, and was a large factor in the re-election of President Bush.

In a three-part series, the BBC explores what it is like to be gay and asks why some societies are more tolerant than others. Part One focuses on Jamaica, a very homophobic country, and what happens when people choose to come out under such hostile social circumstances? Part Two looks at South Africa, where equality - on the basis of race, language, culture and sexual orientation -- is central to the country's constitution. But though the politicians have changed the laws, there is still opposition and prejudice. Will society catch up to the idea of tolerance? The final part explores what it is like to be gay and asks why some societies are more tolerant than others.