Even before the internet, it wasn't that hard to find a Playboy or something just in your house, or even stashed in the wild somewhere. Shit boys would just see an episode of mainstream TV like Friends with nipple pokeys and jerk off to it for weeks, without even getting into the Sears catalogues.

The only difference is just how weird the porn you can find now is, which I'd agree its a real problem kids can walk into sissy hypno or furry porn as easy as simple boobies.