The Definition Is Mutually Beneficial

(My brother is at a staff Christmas party where the girl he is interested in is also at. As they are dancing, she pulls him to a quiet corner to talk.)

Girl: “So, we have been great friends for some time. Over the past few months, my feelings for you have grown deeper, and I am starting to care for you more than a friend. Is the feeling mutual?”

Brother: *with an earnest tone* “No.”

Girl: “Oh…okay.”

(She turns around and starts walking away, dejected. My brother becomes very confused.)

Brother: “Wait, what does mutual mean again?”

Girl: *laughing* “The same.”

Brother: “Oh! Then yes, the feeling is mutual!”