1) Feminists, like most ideologues, have some (even many) valid points.
2) My biggest problem with feminism is not really any particular thing feminists say (though I very often have a big problem with that). My biggest problem with feminism is its atmosphere of hostility, resentment and suspicion towards men; the atmosphere of division and conflict between the sexes.
3) I think the worst possible way for men to respond to feminism (even worse than becoming male feminists) is to develop a corresponding attitude of hostility, resentment and suspicion towards women. Sadly, I see this happening in many places.
4) I think the sexes need to honour and cherish each other, especially their differences. I think men and women need each other-- including happily celibate men and women. And I don't just mean as "people", but as men and women.
5) I believe absolutely that men and women are different in very important ways, and that this difference is fundamental to human society-- a golden thread that runs through all human society, history, literature, folklore, etc. etc. I believe it ultimately has a sacramental significance.
6) I'm always very reluctant to make any particular observation about differences between the sexes. To me, it's something very enigmatic and mysterious. It's like grammar; there are so many exceptions and conditions that every principle has to be approached with extreme caution. And yet: there are principles. Just don't ask me what they are.
7) I always cringe a little when men pontificate about female psychology and female nature. I try to avoid this myself. I have my own theories, theories which are frequently proven wrong and discarded.
Having said that, I don't by any means object to speculation and theorising about the difference between the sexes. It's a fertile ground for humour, folklore, literature, song, conversation, etc. It's part of what keeps the world going around. I think it should be conducted in a good-humoured manner-- although occasional fits of pique are par for the course, and part of the fun.
I've heard plenty of women say clueless things about men, too.
I suspect it takes someone very wise, experienced and learned to comment profoundly on the difference between men and women-- someone like St. John Paul II.
8) I think the distinction between "sex" and "gender" is rather pointless. Human beings are conventional by nature-- as Shakespeare famously wrote, "the art itself is nature". Pink for a girl and blue for a boy may be arbitrary (and maybe not). But it seems part of our nature that we would have such a convention.
Trying to draw the line between nature and convention seems hopeless to me, in this matter as in many others-- like trying to draw the line between form and content in poetry.
Nor do I particularly care about the distinction between nature and convention here, any more than I particularly care about "authenticity" in traditions. I like conventions that celebrate and accentuate femininity and masculinity. Yes, I can see they might sometimes be stultifying or out of place; but in general, I like them and I think they add to the pageantry and flavour of life. Contrariwise, I think that efforts to downplay or neutralise the difference between men and women generally make the world a duller place.