As much as men enjoy the fantasy, I am not that interested in fantasy beyond in passing.
I am not sure if this is in the same vein as that love languages stuff that seems to have saturated the culture but I have equation that I use with respect to woman and children.
Time + Effort = Love
Having talked to dozens of woman over time, having had long term relationships with a few of them and married a second, it has very much been my experience that crushes and infatuation can be fun but if they are unwilling to devote a lot of your limited time on earth devoted to trying to make their partner's life better or unwilling to get your proverbial hands dirty on their behalf...then maybe it is not the right paring.
So an isolated harem for entertainment and progeny is definitely not my style.
Besides, while dumb girls can be pretty obviously, being pretty sounds like a harem qualifier, being dumb would be a disqualifyer. I have a massive amount of content and I need someone smart to talk to and bounce ideas off of pretty much constantly.