And I... really don't get the idea of shipping A and B so that C and D are free to go with each other. When did it become wrong to ship a character with multiple people? Who cares, really, if your pairings overlap? XD

I don't, but then I do understand the desire to not leave a character you like, but don't ship, out in the cold. Thus, why I really enjoy Toph/Aang.