The identity of the Ninjo

Looking at Peter Li's back as he walked away, the flight attendant couldn't help feeling a little disappointed. It was really unexpected that with her looks, she couldn't impress this man.
However, when she saw Peter Li pushing the door and entering the bathroom, the flight attendant suddenly remembered that the young man had gone to the bathroom before and had not come out yet, so how come this handsome guy went in?
"Does he like men?"
After coming to this conclusion, the flight attendant...