Aren't us men somewhat less accountable of being unchaste with our eyes in this day and age since women now are walking around almost naked and if not, they are dressed to provoke and accentuate their body anyways? Now even with a slight, unintentional glance, you can "see" things you had no intention of seeing.
The only way to avoid this entirely is to be secured and not go out into the world, but the great majority of the faithful are forced to go into the world, so you can't help it.
Women used to be covered up before, but now it's out of control.