Re famous people being gay: I don't think sexuality is perfectly simple and straightforward for everyone. There have been people who have moved up and down the line between heterosexuality and homosexuality as their sexuality has changed or evolved or expressed different times of their lives.
Many of us know what we are but I think there has always been a group that travels between the two places and they don't fall into simple categorisation. I know a woman who was married, had kids, had a brilliant professional career. Got divorced, married a woman for 15 years, they split up, are still massive friends and then she was with a man and is now single and happy. I think the gender of the person she loved was irrelevant and her sexuality was expressed to the person first.
Saying a famous person is 'gay' is a bit offensive because, because people should be free to define themselves up to a point. With the exception of political hypocrites and those who support homophobic behaviour/legislation while they are secretly or actively homosexual. There is an argument for outing the hypocrite but I still don't like outing people.
So George and Amal. It is up to them really and both are grown ups. You can see exactly what he sees in her after years spent with women who may not challenged him intellectually. Also this is uber arm candy for him, what a massive status symbol she is for his social group to see. She is with him on her own terms and the press are right to say she is as much of a catch for him as vice versa. The point is every marriage is up against it and these two have a lot of respect for each other so they have a similar chance to many.
I'd like to see the prenup though, I wonder if he let her draw it up. I'd make a bit for that lakeside property honey...