Except only a few idiots think that, but for some reason people seem to be super obsessed with the idea that asexual people care how much sex other people are or aren't having. But since you seem to believe that orientation DOES have to do with how much and what kind of sex you're having, it's not that surprising.

And don't be purposefully obtuse. Sexual attraction isn't a complicated concept: it's the difference in how you feel about someone you're attracted to versus someone you're not. If you're straight, it's the difference between how you feel about someone attractive of the opposite sex and how you feel about someone attractive of the same sex. Etc etc with different specifics for different orientations. And, in case it wasn't TOTALLY OBVIOUS, sexual attraction =/= sexual activity, which comes back to the whole point of this conversation in that who you're attracted to (or not) doesn't always have anything to do with whether or not you have sex.