Research and the monsterotica writer

So, obviously, you're writing about sex with a Lovecraftian monster and loving life, thinking about his slick, soft surfaces and his rough, hard spots. Barnacles! Probably has evil barnacles, rock-like and horny (what else?). Colossal barnacles. Barnacles you can really hold onto while...

Wait, would that, like, hurt? We don't want to hurt Cthulhu! We are about loving Cthulhu in this household! Do barnacles just feel like big calluses, kinda like big rough spots with no sensitivity? Or do the little guys dig into the skin somehow? Are there tiny pincers in there or something?

Now we gotta research barnacles.

Google anticipated my curiosity with unsettling swiftness. "Do barnacles hurt whales?"

So I won't link to the guy who answered it because no one needs to be associated with my filth, but the answer is not really: the barnacle secretes some sticky goo (yum) that hardens into a cement-like substance and basically hot-glues it onto the whale/Cthulhu's skin.  Whale skin is also super-thick and tough, but that's not very erotic so that's the part we'll ignore.  You could definitely hang onto the barnacles while going at it with a Cthulhu (NOT a whale, don't do that), assuming the correct proportions of giant-cosmic-horror to space-mollusk to human wench.

All about logistics.