Actor, glam mom, business entrepreneur and fab Southerner Reese Witherspoon is now, basically, also a cool teen. And it’s all thanks to her many spot-on “How to Teen in 2020” lessons courtesy of her 16-year-old (very patient) son Deacon Phillippe. Back in September, we were first introduced to Witherspoon and Phillippe’s mother-son hilarity when Phillippe