KM, I think that is actually a fair point. There are problems with associating gender norms with biological sex. And I'll be honest with you, I struggled with the wording of the statement you highlighting because I do think there is a link between sex and its associated norms for the most part, but there are definitely just stereotypes that seem to be abritrary. And sometimes norms seem to be an awkward mixture of both.

Trucks are a good example. No doubt, women can enjoy driving a truck as much as a man, and can find just as much use in it. But trucks do tend to be used to haul heavy equipment and they are used predominantly in manual labor professions like construction. And men tend to perform these more often than women for reasons that might not be limited to biology, but are definitely driven by it. Men are, on average, larger and stronger, and are more pre-disposed to do physical work for a living as a result.

So men driving trucks is somewhat of a socially conditioned behavior that has some biological reasons behind it as well.

But that's why in my previous post I tried to define gender as the totality of traits that stem from biolgoical sex, including those that are socially conditioned or expected. That way we can say that not all aspects of our gender need to be adhered to.

So I do believe that gender has aspects of it that are socially constructed. I just wouldn't go as far as to say that gender is, itself, a social construct.