Considering the readership of this site will be predominantly male anyways..
(And for the love of pascal would you please stop bandying about the "sexism" label? It is literally nothing more than a personal attack that adds nothing to any conversation)
The man is expressing his opinion and if you're bothered by that, perhaps you should consider turning off your computer and not participating in internet discussions. There are plenty of places in this world where people won't offend your delicate sensibilities.
He expressed his opinion that women are inscrutable and more susceptible to irrational impulses, but failed to provide any rational evidence of the same. This is sexist. The fact that it's "his opinion" and "his right to express it" buys him nothing in my book.
> consider turning off your computer
I'm fine where I am, thanks.