Those questions, which begin with “who” and ask for a subject of action, have the right word order and don’t need any auxiliary. The verb in such questions stands in the 3^rd person singular.

• Who stands under that huge tree?
• Who dresses like you?
• Who wants to live forever?
• Who dares to love forever?

We use the auxiliary verb “to do” in Present in addition to the main verb if we want to build a question.

• Do you like visiting museums?
• Does your little sister go to school?
• What does he do when he stays alone?
• Do they all attend seminar classes?