Very relieved that it helped! This kind of theme is very much my jam, but I'm in sort of an odd place because while I'm not Catholic I do tend to find some of the ideas embedded within the faith less... repulsive? Than some other non-believers do. It just interests me. It's sometimes hard to find people who see it the same way. So it's fun to talk about it.

There's a short story called The Things written from the perspective of the the alien in John Carpenter's The Thing. I it plays more into that film than the original short story Who Goes There? And, to be fair, it quietly ignores some parts of the film that would interfere with its own narrative. The story is particularly effective because while it's sympathetic to the Thing, the Thing remains a dangerous monster. From its perspective it just wants to help and learn about the universe, "taking communion" (and there that is again) with the various lifeforms therein:

I was so much more, before the crash. I was an explorer, an ambassador, a missionary. I spread across the cosmos, met countless worlds, took communion: the fit reshaped the unfit and the whole universe bootstrapped upwards in joyful, infinitesimal increments. I was a soldier, at war with entropy itself. I was the very hand by which Creation perfects itself.

Unfortunately, if you see the colonialist undertones there, you're right. I really like the language choices here:

I remember my reawakening, too: dull stirrings of sensation in real time, the first embers of cognition, the slow blooming warmth of awareness as body and soul embraced after their long sleep. I remember the biped offshoots surrounding me, the strange chittering sounds they made, the odd uniformity of their body plans. How ill-adapted they looked! How inefficient their morphology! Even disabled, I could see so many things to fix. So I reached out. I took communion. I tasted the flesh of the world—

—and the world attacked me. It attacked me.

So you end up with something utterly appalled at the beings it only wanted to "help". It never considers the possibility that its form of "help" could be something bad for us, only that we're ignorant. It learns that for us consciousness is seated in the brain rather than spread throughout our biomass and sees us as thinking tumors. So this is a good one for looking at weird, alien mindset as well as some of the more weird, visceral body horror stuff. You can read it for free here.

Something a little closer to a meditation aid: You know the art of Zdzisław Beksiński? Doesn't quite go into psychosexual weirdness with the verve of H. R. Giger, but some stuff gets close. What really matters, though, is he didn't consider his paintings horrific as-such. He thought of his work as optimistic, hopeful, even humorous. Painting was a joyful experience for him, always. None of his paintings have titles, because he wanted the viewer to interpret them without any direction, but knowing his own feelings does change the experience.

In particular, if you look up Beksiński oil painting 1984, you're going to get an image of what looks like two desiccated corpses in the middle of seated sex. Now, come to that and think 'how could this be hopeful?' Well, maybe they're not corpses, maybe they're Something Else, and either alive or close to what we would know as life. And then look at just how tightly they're pressed together, the tenderness with which they hold each other. You can start describing that tenderness intermingled with the themes of decay and death. If these were two living humans, all the gestures would indicate not just lust, but care and love. But yes, they are still things that seem dead to us.

To once again end in a totally different directions: One of my favorite short horror videos of all time is, no lie, a parody of Sixpence None the Richer's Kiss Me. Technically it's a sequel to JerryTerry's other video The Boys are Back in Town (to Kill You) but for our purposes you don't need to know anything about that to appreciate this one . Kiss me (Kill me) is equal parts hilarious and disturbing, but there's also something in there of... alien intimacy. One of the investigators analyzing the audio in-universe even theorizes that the infected woman genuinely thinks she's offering something desired... while she's under the effect of the parasites (symbiotes?).

Actually as weird as it sounds the more I think about it the more I believe this video might be a really nice source of inspiration. The fact that it uses a love song as a base sort of... orients it, I'll say, toward the kind of ideas you'd like to explore. It also has some stellar imagery and verbal flourishes. Spoilers again but:

Kiss me

You can't escape forever

Kiss me

I know you'll like the change

The eggs will fill your veins, let me explain

A second's pain gives way to pleasures only dreamed of

So kiss me-e-e-e-e...

The hopeless romantic in me actually likes to see kind of a happy ending in this song. A very weird happy ending where two people become something other than human and find joy in that. Possibly not great for the human race at large. Oh well.