In an adult classroom-and-library role-play, a mischievous glasses girl makes the outrageous demand: “Masturbate under my skirt.” I know it is risky but cannot refuse, so I secretly jerk off without anyone nearby noticing and unload a huge amount of cum onto her panties. The sight of all that semen turns her on, and she lets me go far beyond masturbation. What begins as a prank involving forced public jerking off ultimately leads to penetration.