Wandering hands

It's hard to decide whether its accidental or purposeful brushing or touching, when crammed together on the tube swaying from the motion of the train on its forward trajectory. I became aware of a light touch in the groin area and saw a mans large hand with the knuckles leaning against me, so I moved away slightly. My stop came. I got off walking with the throng of crowd towards the escalator, stepped on, suddenly aware of a body close behind me. Tall. Sort of looming. But escalators are crowded in rush hour and people do step up right behind you in these busy times. And then the brush of something lightly against my buttock. Could be accidental. Could be. Just not at all sure that it was. A cursory backward glance revealed the same man with the knuckles. And then I stepped off at the top and walked away.