You do

Without further thought you leave your classroom and the building, walking up the lawn in the direction you saw the man and the girl. You notice that from ground level the building they entered is hidden by the landscaping. You see no sign of other people as you make your way towards the building.

It's a small structure, no more than ten feet on a side, with small windows on two walls and a door on the third. It's built of stone, in much the same style as some of the other buildings on campus. You see nothing of the couple who entered it, but as you get close you can distinctly hear moaning coming from within.

Smiling, you step to one of the windows and peer through the grimy panes. You're not surprised to see the young blonde schoolgirl bent over a pile of sacks, her skirt thrown up on her back. Her face is a mask of excited ecstasy, and she writhes back against the black man who holds her hips and fucks her relentlessly.