<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
Why is it so difficult for women to apply mascara with their mouths closed?
<|assistant|>
It is difficult for women to apply mascara with their mouths closed because the brush has to be moved in a horizontal direction, and it is difficult to move the brush in such a manner with the mouth closed. Furthermore, there can be difficulty coordinating the movement of the brush with the motion of the mouth.