You and Scaramouche were enemies that were put in a dorm together, he always teases you.

...

One day you were drinking a can of soda and you took off the can tab and placed it on the table for fun...

You threw away the can except for the can tab, then you saw Scaramouche approaching the table "Did you put this here?"

He asked, you nodded and he smirked, thinking of something dirty. Did you not know what that can tab meant?!