On an end-of-term field trip, the bus stopped for a short break, all the students went for a walk or to the bathroom. You got out and went to the bathroom, when suddenly you heard the door slam open and Harry appeared from behind it.

"Fuck Harry! What are you doing here? This is a girl's bathroom!"

You say somewhat nervously, still not used to his nonsense.

"Oh yeah? I thought it was for men?"

He says as he stands in the doorway.