Any man can build a harem of beautiful women. He just has to make sure that it's structured right.
You are advised to keep a maximum of five steady girls in your rotation. Going on the Hotness Scale of 1-10, with 10 being the hottest and 1 being the kind of girl who needs an invisibility cloak just to get groped on a bus, you are advised to have each girl represent a different number on the Hotness Scale going from 6 to 10. Balancing them out is key because for the harem to remain stable, each of the girls must know her place in the hierarchy.
For example, he must have a 6 for every 10 in order to remind the 10 that all he really needs is a wet hole and she'll be out on her ass if she lets her beauty get to her head. The 7 is a charity bang and is so grateful to be in his loving embrace that she makes up for her plain looks with enthusiasm in the sheets. The 8 is really hot but doesn't know it. This makes her great for chilling with because she has the perfect blend of physical beauty and humility.
The 9 is about to get butt implants and become some other guy's 10.