Do you know who/ what you want? Do you get them?

A friend once described it to me that you always know what you don't want,
i.e. you are asked what you want for dinner? don't know? what about Pizza, Indian or Fish & Chips?
Your answer is almost always "I definitely don't want pizza, but maybe Indian..."

And is it a scorpio thing that we don't know what we want/ who, but we know what/ who we don't want and they are usually the ones that can't let us go...? Or a girl thing...

But why does that same rule apply to me? Unfair universal laws of attraction!!!