Well... believe it or not:

There was once a time, in which people could only easily find erotic images in the lingerie-section of the Sears Catalog (in which the models were wearing semi-translucent lacy lingerie).

And what's worse: that catalog would only come out a couple of times per year.

In fact... so lacking to the general population were easily accessible sources of erotic imagery in that era, that not only was it adolescent teenage boys who anticipated the arrival of the Sears-Catalog eagerly... but also even women themselves, who would await in great anticipation for a blissful, soul-soothing, erotic peek at the Lingerie Section of that Sears Catalog.

Hard to believe... I know... so you modern, next-generation whipper snappers thank your lucky stars that a plethora and multitude of erotic imagery is so easily available to your every wish, whim and desire, whether you be male or female.