Marriage: A word which should be pronounced 'mirage'.
What I think we fear is rapid pronounced and uncontrollable changes to ourselves and because of this we have a form of personality inertia - something that resists rapid change.
When I was a child I asked my mother what homosexuality was about and she said - and this was 100 years ago in Germany and she was very open-minded - 'It's like hair color. It's nothing. Some people are blond and some people have dark hair. It's not a subject.' This was a very healthy attitude.