> Fucking doesn’t form a family, normal is relative.
Yeah, you can adopt as much as children as you want. But your DNA doesn't live in them. When you didn't made them with your sperm/ovum, they are biologically NOT your children, maybe judicially, those patch-work families. But that is a different story.
> Sadly, for some people, everything has to be black or white.
You are seeing it that way. Traditional family, one man, one woman and maybe 2 or more children, is bad "cave man family" for you.