For example, a Bai Fox's partner could be of the same sex, or be a simple, non sentient animal, or even be a random tree. The possibilities were endless.
Accidentally Married a Fox God - The Sovereign Lord Spoils His Wife
"Since we cannot properly finish the union, we shall make do with what we can. Copy my words: 'I thank the cretin Jade Emperor for allowing this contract to be formed. What is once done cannot be undone; the red threads of fate shall entangle eternally'."
Accidentally Married a Fox God - The Sovereign Lord Spoils His Wife