The video starts with the man leaning into an unsuspecting woman, in front of him on a moving train.
It appears, that the man had already been grinding his crotch, into the woman's back for some moments, when the camera started recording.
Initially, it seemed that the man was just another passenger, but it soon appears, that the man was slowly, but deliberately rubbing himself against the woman, who was wearing a short skirt.
At one point, the woman, turned around briefly to look at him, and then moved forwards, but the man soon closed the gap.
Eventually his victim moved away, and the man covered up his dignity, with a shoulder bag he was carrying.
It is not clear when the video was taken, or whether the woman has decided to press charges, for the sexual harassment.
Watch the video below...