You showed your boner to him.

You moved your jacket, showing how hard you are to him. His expression showed he was a bit shocked and flustered, and you was the same. You honeslty didnt understand why you did that eitger but there was no turning back now. "Uhm, s-sir?" He said, stumbling over to you. "Y-You shouldnt do that, that will attract attention and gelive off the wrong intention." Well he sure was considerate, that you know. You blushed madly, not knowing how to respond.