Kings and Queens

You often see paired trees amongst the forest stands, I think their planting must be by design as so frequent are they. Here, as so often in other pairings, the forest monarchs grow together; the Oak King and the Beech Queen. I wonder why pairs were planted. I'd understand if two of the same species were planted together, as sometimes they are, but two different species. Is there a benefit to each in this bonding? Or was the reason more esoteric and now lost to us? Maybe the old woods men, who'd have been brought up to understand and respect tree lore, planted them together merely because they were King and Queen, and it would only be right. These two were spotted embracing on the boundary bank of Burley New Enclosure (1700).