One of my recent encounters involved a tall and beautiful French girl. The interaction did progress nicely, until she asked me from where I was. The conversation unfolded as follows:
"Wait, did you move to Berlin from abroad or are you from Germany?"
Suddenly her lustful smile disappeared from her face and instead of intensely hugging me and caressing my back, she stepped back and frowned. She also started to sound rather aggressive:
"My ex-boyfriend was German, and he was such a.... such a... I don't know the male word, I mean he was, like, such a slut -- but the male version. Do you understand?"
I understood the words, but was unable to follow her reasoning at all.
Then I shrugged, but she looked at me really angrily and simply walked off.
Of course, there is no male version of "slut" or even "bitch", and not just for cultural reasons, even though the dried-up femi-nazis would disagree, but let's look at this girl's utterly absurd logic:
(1) My ex-boyfriend was German and an "asshole"
(2) You are German.
(3) You are an asshole.
(The hidden premise is "All Germans are assholes", by the way.)
It was so absurd that I found myself laughing out loud in the club.
Of course it's questionable to make a generalization based on single observations, but having encountered plenty of encounters of absurdly twisted logic, I'm not surprised that mathematics is one of the very few academic subjects that are not dominated by women.