In this bizarrely corny segment from "The Tonight Show", Jay Leno takes it upon himself to help various people celebrate the holiday properly. During the bit, he pays a visit to America's least festive gay couple, and gets them in the Christmas spirit by decorating their house with a stolen tree and fake snow. He then leads them in that classic holiday tradition of pelting the local Chick-Fil-A with snowballs.
It's all sort of awkward, but kind of sweet at the same time. Take a look at the full segment above or skip ahead to a minute and a half to see Jay do his part for marriage equality.