What is the screen name' blank' of another couple?

Remembering a joke may help you deeply understand the meaning of a black screen name.

On the first day of class, a young male teacher saw a beautiful girl sitting in the first row, wearing a sexy dress, but the girl's sitting posture was a bit indecent, wearing a miniskirt with her legs spread apart. Then the male teacher skillfully said to her, "this female classmate, would you please close the book?" Then the female classmate immediately understood and crossed her legs very embarrassedly. But at this time, the male teacher was young and excited, and there was a little reflection below, which was immediately seen by the girls. Then the girl skillfully said to the teacher, "teacher, would you please put down the pen?" As a result, the teacher was also embarrassed. Finally, in order to ease the embarrassing scene, the girl said to the teacher, "Teacher, I wonder if you would like to take notes in my book with your pen after class?"

So the couple's screen name should be something meaningful, such as a brush. The most important thing is not the screen name, but to try to fill her blank with your pen.