Eren: you fricking idiot. A brush is used for your teeth!

Jean: no it's used for your hair!

Marco and Armin: la...la la la la la

Eren and Jean: ...

Marco and Armin: *looks at them weirdly* what?

Eren: what're you guys doing?

Marco: doing our routine

Jean: what do you mean? We never see you do this

Armin: this is what we do when you're gone.

Jean: oh...a brush is for the hair

Eren: no it's for the teeth

Jean: hair!

Eren: teeth!

Marco and Armin: ...