2. Doodie. 1.(n.)an unpleasant word that usually small children use to describe how they don't like someone; just plain creepy when a parent says it. 2.(n.)a nasty brown substance that comes out of your rear and lands in the toilet. 1.child: No I don't want to go into time out! You're such a doodie!.
Yes, moss does begins a very, very large part of its life cycle only on the north side of trees in the US. However, after a very, very long time that the moss has established itself, I'm talking decades here, then the moss will take over the south side too.
If the moss is growing in a low-lying area where the soil stays wet, improving the drainage can discourage moss from growing. Avoid watering on an automatic or regular schedule. This can encourage excess moisture and wet soils. Water your lawn only when you need to.