I meet my friend in a crowded park, she takes me to a secluded spot and teaches me the art of silent masturbation. She whispers instructions as she slowly strokes her pussy underneath her skirt, her body tensing as she brings herself closer to orgasm. I follow her lead, trying to match her rhythm and control my breath as I finger myself under my own clothing. The sensation of pleasure mixed with the risk of being caught sends waves of heat through my body, as we both cum quietly, our secret shared only between us.