Baby Its Cold Outside
Their neighbourhood was famous for their Christmas lights, and Jesse was totally cool with that, because that meant he had an actual reason to prop the ladder up in the snow and scale the side of the house to decorate for the silly season.
(Not that he needed a reason; it just sounded better when he was telling Beca about it.)
When he was a child, his parents would walk around their neighbourhood with him, letting him look at all the different houses.
Much to his surprise, Beca's parents had done the same thing, only they had bundled her into the back of the car ("probably because you're so tiny you'd freeze in the elements" "Jesus Swanson, we were looking at Christmas lights not camping with Bear Grylls").
Every year, he and Beca would walk around the streets of their neighbourhood, rugged up to stay warm in the frosty winter air.
"Every year you say this is a good idea", Beca said through chattering teeth, and Jesse rubbed her arms a little. "And every year this is not!"
"It's the best, Beca!" he protested. "Want to go and get a hot chocolate?"
"I want to get into the bath with something strongly alcoholic that'll warm me through".
"Hot chocolate it is!"
As they walked to the tiny little diner, hidden underneath the mounds of decorations out the front, Jesse sang. He was the world's biggest Christmas caroller, and he ranged from children's carols (Jingle Bells was his favourite) to traditional classics (he could sing the hell out of Silent Night).
That night, it was Baby Its Cold Outside.
(He was singing both parts in the hope of Beca joining him for a duet.)
"you're such a weirdo", Beca groaned, pushing the door to the diner open and trying her best to ignore the man she had chosen to marry.
"Oh baby its cold outside!" he sang, making the lady at the counter laugh.