Aqualad and Garth was a swerve, not that I didn’t like it, but it seemed a little out of left field given Garth and Tula in YJ season 1 as well as Kaldur and Tula as implied in season 1. This also lead to Kaldur’s deception of Black Manta in YJ season 2.
I mean, it is totally possible that YJ Atlantians are more commonly LGBTQ than Humans and that would explain it if both Kaldur and Garth are both bisexual, but that doesn’t mesh with anything we’ve seen regarding Atlanteans thus far.
It is also possible that Kaldur and Garth are simply both homosexual or one is homosexual and the other is bisexual without any other societal factors in play. It just seems odd given that, in season 1, both were vying for the same girl.
So I think more explanation is necessary.
Note: I’m Ace, so I’m part of the LGBTQ community, so I’ve got no problems with Aqualad being gay/bi/etc. Nor do I have any problems with the same regarding Garth. Just the specific ship (Some YJ fanfiction writers are squeezing right now as Kaldur/Garth, aka Garthur, was totally a thing.) Seems highly unlikely given the two characters involved.