How To Know How To Greet Someone Of Another Culture

How do I know how to greet someone of another culture?

I've had to learn, and I always hesitate and wait and see if a person's leaning forward. You have to understand too that customs change. When I was a youngster women did not shake hands and a man would only shake hands with a woman if she extended her hand first. Nowadays women shake hands with women. And then there's the social (kiss, kiss), which became very popular when Jackie Kennedy was first lady because she was very continental, so she knew about the protocols in Europe. So it's sort of tricky, sometimes ask and just take your chances, and it's better to have less body contact than more.