Wiki is that not reliable Kev.
If you read the histories of Alexander, he actually formed that crack fighting regiment out of handpicked gay men (and of course in those days, especially in Greece / Macedonia, gay men were a majority).
The idea was.......that the men of that regiment were paired off....one old, but experienced soldier, and one young inexperienced soldier who was much fitter. The two became lovers, and actually protected each other in battle.
The whole system was based on that pairs teamwork. This regiment often surrounded Alexander, and were his elite bodyguards, and were used mainly for skirmishing and Alexanders protection. They were different from the other regiments that Alexander used on the field in the formation of the phalanx, where 12' long sarisas (thrusting spears) were used. The Companions, not being a part of the main phalanx were much lighter armed, and employed swordsmen, stone slingers and light cavalry.