>but not when the women are portrayed in a more negative fashion?

Could it be because for centuries we ran the world and told women they were inferior, didn't let them vote, didn't let them drive, didn't let them have financial autonomy, etc.?

Could it be that, generally, men have things pretty good today and in many ways women still have not caught up?

Could it be that you need to tread a pretty fine line if you want to make humor by poking fun at half the population who were systematically oppressed for the last I-don't-know-how-many years?

One wonders.