On the show, it's well established that Lois is a very overbearing mother who, if she doesn't like something doesn't allow it. Many episodes revolve around her irrationally forbidding one of her sons from things like, parties, sleepovers, girlfriends, mini-bikes, fireworks, etc... It's also well established in the show she is very tight with money.
Yet, for whatever reason Reese has frosted hair. There is no episode where he dyes it the first time and she flips out. Reese's hair is just "dyed". What would the in show reason for this be? Or, did I miss a scene in an episode between 1 and 3?