Double Standard?

As the Easter day ran down, we sat
watching an old Star Trek. It was a story about
how this Princess that they were suppose
to transport to another planet to be married.
The Princess was a spoiled brat. And demanded
to be treated like she was on her own planet.
That she was not to be spoken to unless she said
it was ok, and not to leave the room unless she
said you could. And they were to bow to her.
Captain Kirk informed her that she was on his
ship and went by his rules, that if they were on
her planet, then they would go by her rules.

Which made me think of the recent news
headlines. First of all, the hoopla about the
Queen. The touching bit. And also my
understanding that the President and
the First Lady were to bow/curtsy to the
Queen when they met.

Then you have the big blow out over Obama
bowing to the Prince of Saudi .

Why does one outrage us, (the Prince) and
not the other (the Queen)? Is that a double
standard? Is it not the custom of their country to
have people bow to them? Were the Obama's being
correct? I don't know the answer, but Captain Kirk's
answer kind of rang true. When in Rome.