Almost every girl would have experienced corner masturbation. When they were innocent and had no sexual knowledge, they accidentally discovered that the feeling of a desk corner hitting their crotch was pleasant. By slowly moving their hips and rubbing their pubis against the desk corner, they were overwhelmed by a sensation they had never experienced before. It seems that not a few girls indulge in corner masturbation secretly. Once experienced, this impulse cannot be stopped by anyone! All 13 were filmed.
