There needs to be more weird Kryptonian biology added to fics. I want to see the most absurd behaviour from Clark.
Just think about the possibilities.
He could eat rocks, simply because he enjoys the texture. Most rocks don’t have a taste to him, but he particularly likes the crunch of harder things, like diamonds or basalt.
He could create warm nooks around the fortress/manor/his apartment for comfort when he’s scared, or much like a bird, when he’s stressed. Bonus points for dragging any child within grasp into it for security, whether it be his child, a robin, or even Krypto when nobody’s around.
He could follow obscure mating rituals that even he’s unaware of without the assistance of Jor-El. He doesn’t understand why he feels the need to be bright and flashy in Bruce’s presence, but he knows that if his cape isn’t as brilliant as possible, he stands no chance to win the bat’s heart.
I guess, what I’m trying to say, is that kryptonians in my heart should behave like freaky birds.
And once bruce studies the fuck out of it, he’s enough of a freak that he really likes it.