1 Work by tofus in Naruto
"Oh yeah Mitsuki, we never found out about your parents…" says Sarada, eyes narrowing. "Just who the hell are you?”
“Orochimaru's," chirps Mitsuki.
“O..Orochimaru. You’re saying you’re Orochimaru’s son!? But you need two parents, who is your mother…or maybe… father?”
And then, like he's been waiting for this his whole life:
Or, the "how Orochimaru gave birth" headcannon that nobody asked for.