My unsual discovery

For about two months now I've seen no change to my sides while my top looks great. A friend of mine with some sick waves told me he has the same problem when he started and said brush each side with the opposite hand.
right side of head with left hand
Left side of head with right hand

He said he can't say thats the reason for his waves looking that good, but he says it probably helps since his hand stays at the same angle because of the reaching.