Quoted By:  
  >Riding the train with Petra
>The train is very crowded
>There's little space to move
>You can feel Petra's soft boulders resting on your back
>Your face is squished up against the door
>Petra gropes your crotch while taunting you to not get hard in public with the most smug expression
>If you get an erection, you cannot possible leave the train without people seeing your bulge
>