The king may, however, have concubines. Tamar was David's daughter from a beautiful concubine captured in war. Amnon violated her and "hated her with a very great hatred." Why? Because she entangled her pubic hair around his member and cut it. But Jewish women were renowned for not having pubic hair!? - Tamar was different.
"The king may not multiply horses..." - only enough for his chariots. "And silver and gold he shall not accumulate overmuch" - only enough to pay his soldiers' wages.
He writes a personal Torah scroll for himself and always carries it with him.
Art: The Harem by Juan Gimenez y Martin