I hope their life together is long and wonderful

Homosexual behaviour has been exhibited by every known species. Homophobia has only been documented in one .

Who's fuckin unnatural now?

Swans are also apparently Hella gay so.....

AND THEY WERE ROOMMATES!

No. They were best friends who lived together. (Don't worry, I know the vine you're talking about haha)
Sharing the same shell?
- Who knows what they were up to when nobody was watching... 😅
Oh my god, they were roommates.
I keep babbling about turtles being shell-friends. But apparently some turtles are more than just friends!

When I was a teen I asked my religious homophobic grandma if animals dont have rational thought but can still be gay, how did they "choose" to be gay? Her response? Gay penguins dont have souls so it doesnt count.

Just shows you that people like that just want a neat and tidy (thought terminating) answer, rather than to know the actual truth.
- Wikipedia has a whole article on that.
To which I'd have been tempted to reply: "Then how is it that they care for one another if they are without souls? Maybe being so callously judgemental of that which you don't understand makes you the soulless one who doesn't count."

It's cute and all but... I really hate that arguement. If it wasn't natural, it wouldn't make it any less moral. We don't need to play by their rhetorical rules. I know that this is just a cute thing, but I see this kind of things all the time and I feel quite strongly about it. So what if I wasn't born this way? So what if it's not natural? Does it somehow make things worse? Or is just an excuse to justify hatred of something that just grosses the 'phobes out?... y'know?

To be fair, when arguing with anyone about things not being natural, point out the car they drive, the processed food they cook, the job they work: all very unnatural things that people "choose" to do.
- Yeah but cars don't go to hell when they die, and they really just care about gay peoples' souls! They swear!
Of course it is a dumb argument, but it is to refute the even dumber argument that somehow homosexuality isn't natural.
- My point is that we shouldn't even entertain the question in the first place. It doesn't matter if it's natural or not. If it was unnatural, it wouldn't make it any less moral or okay.
I've been saying this for years. It doesn't matter if you choose to be gay or not. It doesn't matter how many biological sexes there are. People should do what ever the fuck they want with their own bodies and personalities.
You know what else isn't natural? Clothes, houses, cars, glasses, phones...
It's just a dumb argument to begin with, and it's not even correct. Par for the course for conservatives.

Turtles are the horniest animals on the planet.

If you don't have enough girls per male, they will not be able to eat or drink because they are constantly molested by the fuckmachine males.

If you want to live with turtles, don't mix genders, or get a whole lot of turtles..

Considering their reputation for lack of speed, the sex must be extremely satisfying so of course they're always wanting more! 🤪
- Fun fact, the velociraptor calls from Jurassic Park were based on sounds of turtles mating
- The little buggers are not as slow as people think.
These are tortoises, not turtles.
- https://www.britannica.com/story/whats-the-difference-between-a-turtle-and-a-tortoise
  What is a tortoise anyway? Is it just a fancy way to say “turtle”? Well, actually, there’s a meaningful difference between tortoises and other turtles. All tortoises are in fact turtles—that is, they belong to the order Testudines or Chelonia, reptiles having bodies encased in a bony shell—but not all turtles are tortoises. If tortoises are turtles, why not just call all turtlelike creatures “turtle”? Because if the animal you’re referring to is a tortoise, some wise guy is going to correct you every time.

"Being gay is gay" is the tautology this whole thing will eventually evolve to as all their arguments get refuted one by one.

I wouldn't bet on it. If they cared about their arguments getting refuted via logic and/or facts, then they'd already have dropped their bullshit.
No, they're emotionally still children taught by bullies how to "win" by refusing to back down no matter what, and that "might makes right" so they all back each other up. It unfortunately all too often works for them by simply wearing out their opponents - who can't fathom not giving AF about the facts, and/or just don't know how to defeat such obstinance.
- This is the sort of argument that might stick though "oh yea well world's oldest tortoise is a 150 gay monogomous male tortoise named Jonathan". The problem starts when people begin their discussions like "well scientific studies show that...". You should treat them like they have the attention span of a toddler.

Everything comes from nature so nothing is unnatural.

Well that's not true. Hatsune miku is not natural in the slightest.
- Is an anthill not natural despite having been made by natural beings?
  Is Hatsune Miku not natural despite having been made by natural beings?
  Hatsune Miku is the anthill of humanity. The peak of our nature.

They do indeed fuck.
https://en.wikipedia.org/wiki/Jonathan_(tortoise)#Since_2015
https://www.huffpost.com/archive/au/entry/the-oldest-animal-in-the-world-is-probably-gay_a_23251452
The tortoise on the left seems to be Harriet, one of the other longest lived tortoises tho she's since passed. I'm guessing OOP did a search and got them confused.
It's a meme - not exactly a medium where rigorous accuracy and attention to detail are to be expected. According to this Smithsonian article (soft paywall) from a few years ago (regarding his 190th birthday), he's actually bi and that's quite normal for them.

Where exactly is the line between "natural" and "unnatural" and why should Humans abide by what is Natural anyway?

Those who complain such nonsense are almost always those using religion in an attempt to control and/or manipulate others because "God" is in theory "perfect" and therefore unquestionable. They conveniently forget "God" not only isn't the one making the complaint, but is also the one who supposedly created what they're complaining about to begin with.
- They always have an answer though. Always.
  I don’t understand how people can be so arrogant. Religious people come in two flavors though; the leaders who tell everyone what god wants (lol), and the people who follow those leaders but aren’t arrogant enough to think that their feelies must be the will of god.
  “‘at queer made me uncomfortable, and my discomfort is god talking to me.”
  “Amen brother dipshit!”
Chimpanzees are one of our closest relatives in the animal kingdom.
Chimpanzees are known to be cannibals
Does that make cannibalism "natural"?

Old man yaoi.

I was in a band by that name. We only played instrumental national anthems.
In hindsight, both factors might have limited our marketability a bit..

#goals