Sexual exposure chart


That’s why I spend my Friday nights… uh…

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  1. Can someone explain this one? If I have three partners, and they each have three partners, that’s 13 people. Where did the 7 come from?

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  2. I’d explain it.. but then I’d be wrong. I don’t know how this works.

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  3. From what I can see, this a recursion with closed form a_n=2^n-1. Why?

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  4. No I got that a_n = 2^n – 1… I just don’t get how it models this situation. At all. Ever.

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