I suppose that this misconception might be present in cultures where women are considered little more than chattel, but if you live in a culture where women freely choose their partners, you would have to be stupid or delusional to think they don't have sexual preferences.

The idea of individual female sexual preferences is OK, as long as they remain mysterious.

The outrage starts at the moment when someone suggests that they are statistically predictable, and gives specific examples. This is quickly labeled as "offensive to women". And in some sense, the label is correct -- being unpredictable is higher status than being predictable. On the other hand, there is no harm in saying that male sexual preferences are statistically predictable.

I suggest a thought experiment -- imagine starting a discussion in LW Open Thread about which female sexual preferences are most frequent, and what is the easiest way to trigger them. Then, watch the downvotes and offended complaints. (This is just a thought experiment, don't do it really.) The topic is probably instrumentally important to majority of LW readers, yet it will never get the same space as e.g. a rational toothpaste choice. So there is some kind of a taboo, isn't it?