Some of the more nerdy geeks I know have a problem with invading personal bubbles. When talking to people, or even with people in peripheral and not the primary target, these geeks will stand uncomfortably close. And on this nerdiest end of the spectrum you usually aren't talking about the most..uhh..cleanly.. geeks.

Also a problem between people from different cultures with different unspoken rules about how close people should stand.

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