But how can you talk to each other in whistles? no 1 does that!

But how can you speak to 1 another in whistle language? nobody does that.
Robin Snyder says this to Blossom, Bubbles and Buttercup right before the 3 of them whistle "In your face, in your face."

But how can any of you speak to 1 another in whistle language? nobody does that.
Lincoln Loud says this to Lynn Loud, Lola Loud, Lucy Loud and R A S right before the 4 young girls whistle "In your face, in your face."