Five Geek Social Fallacies: "Geek Social Fallacy #4: Friendship Is Transitive
Every carrier of GSF4 has, at some point, said:
'Wouldn't it be great to get all my groups of friends into one place for one big happy party?!'
If you groaned at that last paragraph, you may be a recovering GSF4 carrier.
GSF4 is the belief that any two of your friends ought to be friends with each other, and if they're not, something is Very Wrong."