God's Compensation/Lore/How aging works for a 6D being

Beings who can freely move along the time dimension do not age unless they choose to. If they do choose to age, it is like stepping into a stream with a heavy current. It is easier to be swept down-stream than to fight the current and go up-stream. As such, it is easiest to simply age at the same rate as a normal 3D being if they choose to age at all. Aging faster than this takes some effort, and aging backwards takes a LOT of effort.