Ted: I can't adopt a baby with you, Barney.
Barney: Why not?
Ted: Because we don't even have one yet and you're already a terrible father.
Barney: Oh, I get it. You want one of the nannies. Well, you can't have 'em! They're mine! So you're just gonna have to get yourself a third nanny. Except dibs on the third nanny! Good day!