I think also a lot of these commenters are coming across this concept for the very first time. However, in the absence of same sex marriage laws, adoption has been the only way for couples to become legally bound to one another across Asia, not just Korea. Finding offence with their kinky banter reads as not only ignorant but homophobic. After all, terms like “house mother” are commonplace even in the West, within ballroom and drag culture. None of it is considered incestuous because news flash, they are not related. Also straight people acting like their own parents didn’t refer to themselves as mommy and daddy and to each other in any other context other than parenting are simply delusional.
Daddy kink ≠ incest. Your heads would spin off the axis if you read the manhwa in my initial comment.

Me in this comment section while also reading Toying with Daddy ( ̄∇ ̄")