frotteurism, i think it what that's called. not too sure, but i
heard it's very common in trains, especially crowded trains/areas,
and especially common in Japan.
i ain't no lady, so can't give u any advise what's to be
done.
had my share of this experience once. it was so crowded u hardly
hav a place to stand. and when the train doors opened, i was sorta
pushed into the train since i was some of the closest to the doors.
when the next thing i knew, i was literally rubbing shoulders with
a beautiful girl. so paiseh, i had to hang my head down, hands
together, and do nothing. 
i thought she was blushing too. 
