I was helping out on a factory shift alongside a rare breed, the female factory worker.
To picture the layout. You've got 5 conveyor belts and 6 workers (4 men, 2 women). The guys end up on one each with the women on one between them (largely because they ran giggling to it like a pair of school kids).
The guys get to work. The women get to talking, while occasionally stopping to do some work. I would say that, on average, the lines the men were working on were clearing about 3 times as fast (on average) as the one the women were working on.
The manager on duty looks resigned to this situation, the look of a man who's tried to do something about it before but been told to 'suck it up, we can't afford to look sexist' by his superiors.
Then, at the end of the day, the women collected equal pay to the guys who had, on average, worked 6 times as hard as them.
The sheer inequality women face in the workplace is enough to make a feminist out of anyone...