That's not what I meant at all and such a union is not unrealistic and, even if it's unrealistic, I was talking about harem as a fetish in games... so yeah, it can be unrealistic no prob. And if you consider what I said as "modern harem" of sorts, does it mean you agree with me that there are different types?
And also, that's not the 'by the book' definition of a harem. The definition is literally of a housing/place/'set of rules' for guarding and keeping women from contacting with men that are not eunuchs (who were used as the guards of the harem). But the harem was also frequented by young male children, female servants and non-married female relatives. The fuckfest fantasy you mention is a fetishised version of what a harem acually is, so you are arguing with me by using another 'unrealistic' version of a harem. And I was literally talking about harem in fiction. As a fetish. Not the literal thing, I don't even know why you brought literal harens into the talk.
But the closest meaning to what I was talking about is 'polyamorous harem', but not quite it also, the members of the harem don't need to be in love with each other, just need to like and convive with each other without having to dedicate their lives to the harem head. Also I disconsidered all the restriction (all the haram) of the harem, so it's even more detached from the original meaning