Cleaning up some tabs, I am reminded of this one, linked from serakit: The Geek Social Fallacies of Sex. Like the original Geek Social Fallacies, this is mostly drawn from observations of common anti-patterns you find in the Geekosphere. None are anything like universal, but heaven knows I've observed all of them among my friends at one time or another. (Indeed, I've certainly made some of these mistakes myself.)
Worth reading and reflecting on. Indeed, I'm finding the blog in general to be interesting reading. This related post may be the simplest and most correct statement about sexuality that I have seen in many a year.
(Warning: text is, unsurprisingly, possibly NSFW.)