Go again.

Home can wait. You move your hand down between your legs and begin to pleasure yourself again, now fully with an audience. You look directly at him and flush with excitement. You've been caught, and it feels so good. It's so dangerous. Your hands wander around your body and you stretch out through waves of euphoria.

Slowly, the man moves closer, until you're both under the shade of the two buildings.

Your eyes stare at the fully pitched tent below his waist. Maybe you could take this public thing to the next level.