She boards the crowded tube train with a muted squeal as someone pushes her up against me. We look at each other, saying nothing. I can feel the heat from her body adding to mine, the jolting train making our bodies dance, her full breasts rolling on my ribcage. A pleasant way to spend the journey, I'm thinking. But then, her hand is on my groin. No mistake, she is feeling for my cock. A wicked smile spreads across her face. Unseen, her hand plays at will with my erection. Am I arriving with an unrelieved erection, or a stain?