I can remember a few times in the 1970s venturing into those dens of iniquity known as "head shops" to see if there was anything I needed in their pile of underground comics. Oh, how those places stunk of incense! (And (naturally) the comics bought from there were infused with the sickly-sweet aroma themselves.) But that was the distribution network for those comics and there was no other way a body could get an issue of Zap Comix
, for example. Of course anything goes today and there is no need for incense-heavy poorly-lighted backrooms.
Thanks for the reminder, Mutts