I have one or two male relatives on Facebook with shocking attitudes towards women. I just saw a list that compared a woman to a ship. The first item? "Should be steered by a man." It was meant as humour, of course, but I found it vulgar and distasteful.
My former boss once invited me to a Facebook group full of dirty sexist jokes. The group was basically a safe space for male chauvenists. It made me uncomfortable and I left it.
Why this need to disrespect women? It's bizarre.
@staleg and you're right, it comes from both sides and is often disrespectful. Then again, it's our reaction to that, that dictated our feelings, not the words themselves. Doesn't make it any less douchy.
However if you want to know "why", I have some theories about the human psyche, I am happy to share.