People tend to throw out the phrase "extremely specific kinks" as though that inherently implies something transgressive, but in my experience, the overwhelming majority of extremely specific kinks are so innocuous that you could see them in public and not even clock them. For every person who can only get off to having their nipples electrocuted, there are a dozen who are volcanically aroused by seeing their partner wearing one specific pair of socks.
So we all know that Tumblr is US-centric. But to what degree? (and can we skew the results of this poll by posting it at a time where they should be asleep?)