Imponderables

I've recently asked the following questions, to which I have yet to receive an answer:

Under the category of useless features, why do air conditioners have remote controls?  How many changes to the temperature are made in a day?

Why do the batteries on smoke detectors only die at night?

Why is it that I've never heard a man complain about dry skin yet I hear women complain about it constantly?  Are men genetically superior in this regard?