I find it odd that you would have to have that conversation . I thought anyone and everyone knew tentacles had a much deeper meaning and sometimes branched into darker subjects than just porn (I am still at odds with the idea that porn is built upon dark thoughts). When I drew "Wonderland," porn was not my initial motivation and I don't think anyone that views it would have thought of that. Now would they think of Cthulhu reverence. I would hope they would understand the idea of transformation, (being the initial motivation) and how many seek such ideas through various means. A lot of root art is confused for tentacle references or imagery, I always found that interesting as well, how, "tree-roots," are placed in the same categories of "tentacle," art or sex deviances or sex worship. None of which can really be verified but is implied by critics to take away from the original conversation. Much like Dante's Arachne was deemed nothing more than a fetish of his demented mind and a not a revelation of a seeker. Minos was the King of Crete and images devised on his transformation have a tentacle origin and there is nothing pornographic about him, mind you I don't think I'd find him in any museums. One day maybe.
Can you imagine anyone having him hanging on there wall? What would you think of that person, that they like porn? lol.