This is so weird, but I thought of two things.
1) Bucky Barnes is DEFINITELY bisexual. I'm not even second guessing. Dude gives off so many bisexual vibes, it's insane. So, as a bisexual, I can say this (I mean...anyone could say it, but I'm saying it...idk).
Idfk. (SPOILERS FOR: FALCON AND THE WINTER SOLDIER) Like, in "Falcon and the Winter Soldier" Bucky kinds flirts with Sam's sister, but I'm literally over here shipping ✨WinterFalcon✨️ because I feel like Bucky is secretly in love with Sam.
I just think Bucky is bi and no one can change my mind.
2) I like to think Loki is Gender Fluid. I'm not sure why, and I don't even have a good explanation. I just think he (they/she?) is (are?).